said by jaynick:Walmart may have those also, they do around here.
If local "brick and mortar", then either Staples or Best Buy will have them. Walmart, at least in my area, tends to have the older modems only on hand.
IMHO, do
not> go for the older SB6121 Motorola as it is a "4x4" (4 channels down/4 channels up) model.
If you are buying, you want the most up to date D3 model available. Soon enough, Docsis 3.1 will appear as it is.
Buy either the Zoom 5341J, Motorola SB6141, or the Cisco DPC3008.
I recommend the 5341J only because from the Comcast threads I see, it appears to have had the least number of issues...however, any of the three would be good choices.