You big goof Matt... were you trying to prove a point with that lol? copying links to used as-is radios pulled from god knows what (mangled wrecked vehicles?) priced at or above what he is paying for a fresh reman unit that will be "like new" no visual wear (unlike most of what was linked) and it will have a parts warranty (again unlike the used units linked to).
Yes the REC is a dinosaur, and I feel mine is on its way out and will likely not be replaced with another for the price, ill probably end up with an aftermarket double din unit when the time comes. But for what he is getting the value is there, 500 is not a terrible price to pay all considered. Not to mention (again back to my personal preference) I REALLY appreciate factory function (taking the good with the bad) and fit, I despise filler panels and glossy radios on my flat interior trim, having the steering wheel switch function... so again, for myself maintaining the factory appearance and function is worth at least a couple hundred in my book. Also I have the rear seat dvd and have not even looked into integrating that into an aftermarket head unit (unlikely I would imagine) so that further insults my interior.
I would say that is a decent buy, sucky it happened, but don't beat yourself up over Matt's suggestion