Today my SIL offered me her old rocker which is really old and not my style. I didn't take it and she got an attitude with me.

Then at my MIL's she offered me DH's old bedroom set, which is child size, aka the dresser is not even as tall as my butt, and it's also not my style and has no way to make it more attractive. MIL got really offended and I didn't even bother trying to explain that it's ugly and I want my own stuff..at normal height. She even called DH to yell at him about how it was a "$1700 set!!!!" ...like 18 years ago.

What is a nice way to tell these people I don't want their crap. I'm all for used stuff, but not something that old and outdated?