$15K for a toy is ridiculous. I put it in the same boat as paying hundreds of thousands of dollars for a Phase 3 GTHO. Yeah sure it was a nice car in its day, but what are you going to do with it?
I sometimes wonder, why have a big ass collection of anything, but I can go into my toy room and just sit there and look and it makes me happy, so what I do with it is love it in a sense.