White Stag Snorkel, purchased around 1966
Tris Inox Dive Knife, also purchased around '66
Aqua-Craft Bandito Speargun--also about '66
Cressi Occhio Mask--Sometime in the early 70s
Steel 72 tank
Sherwood Magnum Regulator--1983
Sherwood Console, SPG + Depth--bought with the reg
ScubaPro Lightning Jet Fins--bought after trying many other fins
More steel 72 tanks
Cornelius Compressor--we are about the same age
I am still using all of the above
More recently:
2.5mm full jumpsuit that has "Leader Accessories" silkscreened on it. Bought around 2012--brand new $30
SJ7000 Video Camera--not the greatest in the world, but not bad either
3mm soft booties from China for $4
LED flashlight from China for $4
Various regs and consoles and gauges from eBay for very little money that needed a little work