need to buy a comcast modem- which one is a good one to buy?

Hi my friend has comcast cable internet and he is renting a modem from the cable company for 10 dollars per month I told him it will be alot cheaper to buy one instead of renting one. He currently is renting a arris tg862 modem but the cheapest one I can find on ebay is $100 and its used. Is there any other model that is a good brand and that works with comcast?
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Dave BaldwinConnect With a Mentor Fixer of ProblemsCommented:
Here's a list of the approved Comcast devices and service levels.
hydrive1902Author Commented:
thanks, exactly what I was looking for!
Dave BaldwinFixer of ProblemsCommented:
You're welcome, glad to help.
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