Need more details. On the information you have given, between £150 and £250...
Is it actually “mint” - utterly undistinguishsble from brand new? Or just “really nice”?
Box? Accessories? Papers?
I can’t recall them being sold by Anschutz with a scope. If mounted, it’s not mint. Details?
Mk1 (rounded stock, pull-forward barrel release), or (more desirable and I think rarer) Mk2 with squared stock and clutch lever barrel release? Is it a standard sporting 335, or the lower-power target 335S?
If it’s been used, however well cared for, are the fore-end mounting blocks on the cylinder (well-known point of failure) still intact?
Pics?