I would love to get a Sako TRG-42! I've sold many and owned none.
I'd also like a few of the Swarovski, Schmidt & Bender, and Zeiss Optics I've sold as well lol.
But to date my most expensive gun has been my $4300 trap gun. Shot at the state level with it. Even had a fully adjustable hydraulic buttstock. You could literally tune the compression, rebound, stroke length, lenth of pull, caster, camber, and toe. It was like a racecar suspension custom for to the gun haha.
I like my Dubstep to go Wop Wop Wop Wop