WA Prokiller Gigant, no clue but i think its awesome :)
Desert eagle 50-100 inc silencer.
WA Colt 1911 Govern 50 -100 quid
TM MK23 £100 they are currently in fashion but available new for 120-150 depending where you buy
Tanaka Works M870 + 27g shells, the shells are worth more than the gun...