Please help identify these castles
 

I have 2 castles that I believe are mid 80's. One is Snake Mountian but not sure about the other. I think it is He-Man castle but not sure. And any idea of their value. These have been sitting in my attic since the 80'sand some of the parts a brittle. Not even sure if I have all the parts. Microphone on Snake Mountian is intact and the batteries were removed when it was place in attic. Thanks

The purple is Snake Mountain, for sure, but the gray one isn't Castle Greyskull. It looks to be along the lines of Dragonriders of the Styx (a 3 3/4 in line from about 1984 or 85) but it's not shown on any DRotS pages I'm finding.
Is there a maker mark or copyright info on it anywhere?

The gray one is CASTLE ZENDO from the 90's bendable figure line THE OTHER WORLD by Arco.