I took advice from my previous question and did a bit more research, but I have somethin specific.
I realised I have had a City set with a few more "unique" parts. The set is 7900 Heavy loader. I can't seem to find any information on pieces, but I know it contains a unique Trapezoid, modified tubes, smooth large grey plates and I think I can get something from it.
My question to you is more of a plea for advice. If you're not familiar set, you surely at least have a better eye for old set value than I do. Any suggestion for next move is welcome!