Quoted from MrBally:$150.00 for a Bally Rapid Fire that was about six months old. Still paid too much for it. However, it remained in my small collection for 23 years where I eventually sold it complete and in working CONdition at a SuperAuctions for $425.00 . So, at least it wasn't a total loss.
So your "worst" deal involved owning and playing a game for 23 years and then reselling it for close to 300% of what you paid? This is your world, sir. The rest of us just live in it.