not entire collections, but from moving often and leaving some stuff at my grandmother's house, some valuable stuff got lost. Mainly a paperback novel-sized collection of marvels Empre Strikes Back comic (from back in the day) as well as novelisation of new hope, from the 70's. And transformers fans will know how much this stings now. In the early 90's I had fully complete (box and everything) G1 Bludgeon and double dealer and Omegatron, the original toy Omega Supreme was based on, before hasbro made him an autobot.