All I can say on this is I've gotten bizarre offers and made bizarre offers . . . both ways. I've offered BIG stars for two lesser players. Sometimes that "Star" is not performing, or he is part of an embarrassment of riches in pitching, let's say, where I needed to shore up my offense. In that case, trading away Maddux or Pete Alexander for Rose and Clemente, let's say could make sense.
You can always say "no," is my philosophy, and I never have hard feelings.
The only time I DID not like it was when, as a rookie, a veteran manager made me a trade offer which looked spectacular . . . except that the guy I was getting had a "4" injury rating. I was . . . peeved. But it really is caveat emptor, I guess.