Amazon [amazon.com] has Surfboard S34 for
$185.89. The original price is $219 on ARRIS website but the modem has been out of stock since its initial release on July. Amazon delivery estimates shows delivery in 1-2 months(September 2nd week to October 1st Week for our address in NJ). For anyone looking to buy this modem, it could be helpful.
This modem is in official supported list for next gen upload speeds for Xfinity.
Amazon expired
Alternatively, B&H has the same for $219, with expected deliver in 7-14 Business days
B&H [bhphotovideo.com] :
$219.00
From the product page:- Save Money: Own your modem and save. Reduce your cable bill up to $168 dollars per year in cable modem rental fees (Savings vary by cable service provider). Certified for use with most U.S. cable internet service providers. For a complete list see additional details below.
- Modem Technology: DOCSIS 3.1 is the latest technology available from cable internet providers. Its 10x faster than DOCSIS 3.0, provides better security, reduces lag while gaming & enables multi-gig networking
- Next Generation Upload Speed Optimized: Switchable upstream filters to support optimized upload service tiers (provider dependent).
- Simple and Secure Set-up: Plug-in the device, download the SURFboard Central App, and follow the instructions to activate the modem. Connect to a Wi-Fi router for networking.
- Compatibility: The SURFboard S33 is compatible with major U.S. cable internet providers including Cox, Spectrum, Xfinity and others. It's approved for cable internet speed plans up to 2.5-Gbps. Check your Internet Service Provider (ISP) website to confirm compatibility.
- The SURFboard S34 will future-proof your home with the latest DOCSIS 3.1 technology, supporting multi-gigablit internet plants. The SURFboard S34 features support for the the new, next generation upload speed tiers offered by cable internet providers. YWith a 2.5 Gbps Ethernet port plus an additional 1 Gbps Ethernet port it's capable of combined download speeds up to 3.5 Gbps. The S34 is the newest modem in the SURFboard lineup, delivering the fastest speeds and the latest technology without the premium rental cost.
https://www.amazon.com/ARRIS-Surf...r=8-2&th=1 
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