It took me over twenty years of collecting before i finally offloaded a machine
And that was Gtb Quick Draw that i bought on a whim when it turned up for sale in a local Tender Center here. I only kept it for about six months or so, restored it then swapped it for a Bally Black Pyramid (which i still have) and some cash. It wasn't a game i ever played back in the day hence why i let it go. So it was not only the first machine i let go, it was the one i owned for the least amount of time!
I have since sold four machines in the last couple of years for various reasons, usually needing $$ for bills or other purchases.