Actually, AMD is cheaper and even though the speeds of AMD look like they're less they actually out-perform Intel hands-down.

"... An AMD chip operating at 2.8GHz processes data faster than an Intel chip running at 4.0GHz. Even though the Intel chip is going faster in MHz, it is doing less work per clock cycle. This results in more clock cycles being required to produce the same results, and therefore its net output is something less than the MHz value alone would indicate."

http://www.geek.com/articles/chips/why-amd-mhz-dont-equal-intel-mhz-20051215/

I don't know why you're still trying to get $550 for this though. You really need to lower the price if you ever want to sell it.

 Really... hmmm well then i guess Macs are the Crappiest thing goin eh, Right only the best things invented.. and they only put INTEL in it INTEL top of the line INTEL, never will you see an amd in it never, just way to crappy a Single Core Intel pentium D or Celeron M @3.0ghz out performs any Amd dual core @3.0ghz all day long Buddy, I only Know cause i work for IBM and We test them all day long and only will we Deal with Intel Prducts the BEST, AMD is to cheap and crappy slow crappy just like there crappy graphics ATI, sorry ones been on the market for hmmm 20yrs and the other like what 6-7yrs no comparison..

 you do realize the macbook "above" is the same guy selling this one right? lol