I'll bite with my cheap-ish gear (thrifty, less expensive, used?)
Pretty much all used;
regs for doubles
drysuit
drysuit mods (diy p valve and dry rings)
doubles
doubles wing
perdix ai
transmitter
hood
mask
Hollis F1's
DSS backplate (was sooooo stupid for getting that in the beginning)
misc lights, webbing, strobe, bolt snaps, reels, spools, etc... all generic or used
undergarments
$3700 every time I dive with just what's on me.... doesn't hold a candle to you all, I feel like I've done pretty well being thrifty and I still feel sick thinking about it.