It's a gift for a friend, the person really into old school mechas. 80s-early 90s, but really anything goes. Golden Arms, thanks that's a good list to look into. Through may be something not in the Bandai SOC line. He has tons of toys from SOC, and a lot of Gundam figures. I might get him the same one if I buy a more recent release.
I'm thinking may be toys that are older and less popular, or toys that people over looked would be interesting. It doesn't have to be toys, can be fixed pose mecha die cast piece too.