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Sb6121 in Computers For Sale

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$40.00   1 week ago
ARRIS SURFboard SB6121 DOCSIS 3.0 Cable Modem Include Original Box/Pac - $40 (Princeton, IL)

Stop paying monthly rental fee for Comcast/Xfinity modem, buy your own ! ARRIS SURFboard SB6121 DOCSIS 3.0 Cable Modem Include Original Box/Packaging Works perfectly! all original items are included with it. I used it with Comcast/Xfinity but it is compatible with any ISP that uses DOCSIS 3.0 The protective film is still on the display.INCLUDED ITEMS Modem and AC/DC adapter original box, Asking $4

$40.00   1 week ago
ARRIS SURFboard SB6121 DOCSIS 3.0 Cable Modem Include Original Box/Pac - $40 (Princeton, IL)

ARRIS SURFboard SB6121 DOCSIS 3.0 Cable Modem Include Original Box/Packaging Works perfectly! all original items are included with it. I used it with Comcast/Xfinity but it is compatible with any ISP that uses DOCSIS 3.0 The protective film is still on the display.INCLUDED ITEMS Modem and AC/DC adapter original box, Asking $40 cash Text or call with questions at

$40.00   1 week ago
ARRIS SURFboard SB6121 DOCSIS 3.0 Cable Modem Include Original Box/Pac - $40 (Princeton, IL)

ARRIS SURFboard SB6121 DOCSIS 3.0 Cable Modem Include Original Box/Packaging Works perfectly! all original items are included with it. I used it with Comcast/Xfinity but it is compatible with any ISP that uses DOCSIS 3.0 The protective film is still on the display.INCLUDED ITEMS Modem and AC/DC adapter original box, Asking $40 cash Text or call with questions at

$25.00   1 month ago
Arris Motorola SURFboard Modem SB6121 DOCSIS 3.0 - $25 (Niceville)

Used, but still have original box and paperwork.This modem only supports internet speeds upto 172mb. Before purchasing, be sure to check with your cable provider on the compatibility of this modem.

$60.00   1 month ago
ARRIS SURFboard SB6121 DOCSIS 3.0 Cable Modem - $60 (University Village)

Used only a few months before I switched to Gigapower ATT. Includes box, instructions and AC adapter. Compatible with Comcast, Time Warner, Cox, Charter, Bright House Networks and MOST Small Regional Cable Providers (NOT compatible with Verizon FiOS or AT&T U-verse). Internet speeds based on your Cable providers service - up to 172 Mbps download and 131 Mbps upload. 4 Download and 4 Upload Cha

$28.00   1 month ago
Motorola Arris SB6121 SURFboard DOCSIS 3.0 High-Speed Cable Modem - $28 (wilmot / i10)

Motorola Arris SB6121 SURFboard DOCSIS 3.0 High-Speed Cable Modem in boxCALL OR TEXT AT

$25.00   2 months ago
Cable Modem - Arris SURFboard SB6121 - $25

Selling cable modem used for service with Time Warner so I wouldn't have to pay modem rental fees. Bought new in Aug 2015, Works great and is DOCSIS 3.0 compliant. My router needed replacing so I upgraded to a dual wifi modem. This modem does NOT have a wifi router built in. You will need a separate router.

$35.00   2 months ago
Arris Motorola SURFboard DOCSIS 3.0 Cable Modem Arris SB6121 - $35 (milton)

You are viewing a Motorola Arris SB6121 SURFboard DOCSIS 3.0 Cable Modem 200 Series.Stop renting, own your modemDOCSIS 3.0 Cable Modem4 download and 4 upload channelsCompatible with major U.S. Broadband Cable Providers

$15.00   2 months ago
Motorola SURFboard Modem (#SB6121) - $15 (Fargo, ND)

Selling a Motorola SURFboard DOCSIS 3.0 Modem (#SB6121). Was purchased new from best buy about a year ago. Haven't had any issues with it or experienced any downtime. Reason for selling is that this modem is not approved with Midcontinent and was required to upgrade. Original box and manuals are included as well as modem and power cable. asking $15 cashif interested, have any general questions, or

$25.00   2 months ago
Motorola Surfboard SB6121 modem - $25 (Camillus, NY)

This is a DOCSIS 3.0 modem. Worked perfectly for myself for 2 years.

$40.00   3 months ago
Arris Surfboard Modem SB6121 - $40 (Ojai)

Wired modem only, does NOT include WIFI Router or VOIP Telephone adapter. Gigabit Ethernet port to connect to computer or Router for fast downloads.Compatible with Comcast, Time Warner, Cox, Charter, Bright House Networks and MOST Small Regional Cable Providers (NOT compatible with Verizon FiOS or AT&T U-verse). Requires CABLE Internet Service, if not sure your provider is CABLE call them to c

$25.00   3 months ago
Arris Motorola SURFboard Modem SB6121 DOCSIS 3.0 - $25 (Niceville)

Used, but still have original box and paperwork. Upgraded to a newer modem. Works great, though.

$15.00   3 months ago
SB6121 Cable Modem Xfinity Comcast - $15 (Morgantown / Fairmont)

Like new cable modem for xfinity comcast service

$40.00   3 months ago
Arris Surfboard Modem SB6121 - $40 (Ojai)

Wired modem only, does NOT include WIFI Router or VOIP Telephone adapter. Gigabit Ethernet port to connect to computer or Router for fast downloads.Compatible with Comcast, Time Warner, Cox, Charter, Bright House Networks and MOST Small Regional Cable Providers (NOT compatible with Verizon FiOS or AT&T U-verse). Requires CABLE Internet Service, if not sure your provider is CABLE call them to confi

$20.00   4 months ago
Motorola SB6121 Cable Modem - $20 (Turners Falls)

SB6121 DOCSIS 3.0Power SupplyInstall DiscUsed for 6 months

$30.00   4 months ago
Motorola Surfboard SB6121 - $30 (Pooler)

Awesome cable modem, works great!Changed up my whole system so I'm getting rid of it. Get fast internet speeds!$30... EMAIL if interested.

$45.00   6 months ago
NIB Motorola SURFboard eXtreme Cable Modem SB6121 - $45 (Sparks/Reno)

this is a Brand New in Box Motorola SURFboard eXtreme Cable Modem SB6121it features:Compatible with ALL Major CABLE providers (Except AT&T U-Verse)DOCSIS 3.0 CertifiedBackward Compatible to DOCSIS 2.0Capable of Downloading up to 4 times faster than DOCSIS 2.0 broadband cable modemsInternet speeds based on your Cable provider service - up to 172 Mbps download and up to 131 Mbps uploadEnables advanc

$50.00   6 months ago
SurfBoard SB6121 with Linksys Wireless-N router E1550 - $50

This modem works great. I switched to fiber so that I let go this one. Specs can be found here: https://www.amazon.com/SURFboard-SB6121-DOCSIS-Retail-Packaging/dp/B004XC6GJ0/ref=sr_1_1?s=pc&ie=UTF8&qid=1468978162&sr=1-1&keywords=sb6121Comes with the power cord and ethernet cable.Sells brand new for more than $70. Purchase for less than half price!I also sell my Linksys Wireless-N E1550 Router to g

$25.00   6 months ago
Motorola Surfboard SB6121 Modem - $25 (Mchenry, IL.)

Motorola Surfboard SB6121 Modem that comes with the power cord and ethernet cable that is ready to plug right into your computer. For more information please call thanks.

$25.00   6 months ago
Motorola Surfboard SB6121 Modem - $25 (Mchenry, IL.)

Motorola Surfboard SB6121 Modem that comes with the power cord and ethernet cable that is ready to plug right into your computer. For more information please call thanks.


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Last Updated on: February 27, 2017
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