weell i got mine new from bigdicks for £155, also woult bee good to buy a Q-lock(feedneck) and a barrel kit, (freak Jnr)
mine cost about £3-400 and i got most upps, grips, bolt, trigger, barrel, q lock, ab#nd some other stuff.
you could prob get a ion with a qlock and maybe with air bottle on forum pretty cheap now as the SP8 has come out and i think ppl are selling the ion to get one. (just what i think) so you can get them pretty cheap on forum,
hope that helps