I overheard one of the Traders who had loads of airguns for sale saying he'd be there next week so may be worth a look. I thought it very pricey or perhaps I've lost touch. for example

Cadet Major £110
MK2 Airsporter £130 to £150
HW55SM without diopter £185
BSA Underlevers £150 to £350 (more for a straight stocked junior pattern)
BSA Military Pattern £1895
Webley Pistols £100 upwards
Walther LP3 Match £395
Original 6M £90 (Good price)
Webley MK2 Service £495

I went primarly because its a good to see stuff I wouldn't normally see and get to handle as well