I'd recommend looking for complete packages. On Ebay I saw quite a few packages that included arrows, case, and quite often even releases.
Archerytalk.com classifieds is a great resource too.

I ended up buying a "new" 2008 Mathews Drenalin off Ebay. I also got a new CopperJohn sight for $20- delivered off Ebay .

Bought used Rip Cord rest, Stokerized EV1 stabilizer, and Mathews T3 quiver off the archery talk classifieds.

I ended up with $600- in my set up and looking back at some of the complete set ups I was watching and passed could of done a bit better going that way particularly considering some of the nice cases they came with..
Two to four year old top end set ups often have $1200+ in them all told and can be picked up in the 500 to 700 dollars range from what I saw.