When I started shooting a few years ago, I would have said $1000, $1500 tops. Optics, meh, why spend more than $200 ?
After owning guns like a PE-90 (well, several of those), an STI Executive, and several custom rigs, I really don't know what I would or would not spend. I don't know if I would drop for a DSR or a Timberwolf but then again, I haven't had one cross my desk....yet....