I picked up a brand new Double Eagle M82 (SIG552) with FVG, tac light, AEG, LAM, "silencer," battery, charger, bag'o'BBs, loader, sling and glasses for $29 on larcen-ebay. Safe, Semi and Full Auto.
Yeah, it's obviously much cheesier than the Tokyo Marui model and I had to paint the receiver, barrel, FH and FSB to make it look more authentic but I'm not interested in paying $300+ to play Pretend Gun, I just wanted a reasonable, legal SIG facsimile.
Hasn't broken yet, either.