£800 would be pretty cheap, £1250 is Gunstar dealer level, £1000 - £1100 more like a private sale price, mates rate £900-£1000.

That's for a "proper" MFR with the shrouded skinny barrel & uncut stock, If it's got a std 16mm barrel I'd knock £50 off those, & if it's got a QF then to me it's no longer a proper MFR .