Parts you've removed - keep or sell?

Super T said
Sell the stock to pay for the aftermarket, it's the circle of life.

LMAO, after 30 years in this hobby, I have gone in circles so many times, I am dizzy.

I always sell the stuff off, usually at a loss, to pay for the current project.

Just thinking about it recently, I bet I have owned 8 or 9 sets of the 68-70 340 HP exhaust manifolds, one set at a time. :-D