If anyone here thinks you build a championship team through FA you are insane. Name the last team who paid for a few high priced FA that went to the big dance? You can't buy a championship you draft one. Ask the Steelers, Patriots, Giants, etc....
The Bills draft poorly and that is their problem. When is the last time a 4/5 round pick was a starter and considered for the Pro Bowl? Jason Peters is the only one in like 10 years.