its a good point. I think Beane and McDermott both get it that Buffalo can be a hard sell to FAs, especially diva prone positions like WR, but generally once a player is here they like it, trades may be best option to pick up an immediate impact WR/lineman etc.
We need players on O that can step in right away not develop for a year like young WRs from draft often need.
Stock up on vets in FA/Trades, build depth on D and O in draft.