Mine is a bit like Alexh's experience. I was working at Interactive studios (now blitz games), and they retired all their A4000's which the bitmap artists used. Got one with an 040 for £50. Doesn't end there though, a coleague said 'you still like those old things? my dad gave me one, i've never used it' said he'd drop it round. I assumed it was an A1200/A500. He asks me to help him up the stairs with it. It was an A4000T with a warp engine a picasso IV!
I gave the A4000D away to the first person who could collect it on amiga.org. I felt guilty after getting the T for nothing!