Yep, that exact seller had base rMBPs for 2K even. (the price I paid for my base rMBP on eBay.)
They're talking about warranty replacement. If you buy this machine off eBay, you will not be able to get a refund or exchange it for a different model at Apple.Hey that's great, I didn't realize you could exchange your computer at the Apple Store even though you purchased it somewhere else. Are you 100% sure about this? I purchased an iPhone 4S last year from the Apple Online Store, and was told that I could not return or exchange it at Apple's retail store. I needed to exchange it due to a screen problem and was unable to do it locally because I purchased it online.
Please make 100% sure before buying something off eBay.