Had this problem last season. Though I was snagging some real value in Amari Cooper, Golden Tate and Carlos Hyde.
Looked like it was going to work out until they all got traded. Damn near destroyed my team. Luckily, I was able to get Chubb on the waiver along with dart throws in Tyler Boyd and Calvin Ridley. I eventually recovered and probably ended up better in the end but it took a lot of effort picking the right parts out the bargain bin.
Trying to avoid that this season. Cooper, no way I could have known but the other two, they were primed to be traded; older players, on staggering teams where it made sense to start the re-building process in season.
I have not started researching this yet but I have a few players already I want to avoid even if they are bargains.