Good luck, the only semi auto .308s I've seen in that price range lately have been VEPRs and Saigas. Saw a PTR recently but I can't remember the price, over $1K though.
I'd suggest saving and waiting out the panic for an M1A, maybe go ahead and buy some mags for it if you can find them.
Cpl Williams, Evan T. USMC, 08FEB2010 ~
D Co, 4th CEB, Engineers UP!! OEF 21JUN-20SEP2011
REV. 19:11 And I saw heaven opened, and behold a white horse; and he that sat upon him was called Faithful and True, and in righteousness he doth judge and make war.