Common Fantasy Blunder

Just was up reading some late night posts on Rotoworld, and it reminded me of a common fantasy blunder that is far too common.  For instance, if you decide you are going to go out and trade Cole Hamels for a top catcher, don't propose one deal for Geovany Soto.  If you're that dead set on getting a Catcher for Hamels, why not offer him for McCann, Mauer, and maybe even Martin first?  Then, if those owners turn you down, you can pull the trigger on Soto (although I wouldn't advise it).  

Just saying, it's laziness.  You need to assess the market value of a player before you trade him, or you're leaving stats on the table.