The Buffalo Bills have been the NFL's highest spenders this offseason, but how do their moves in free agency stack up against other teams?

ESPN NFL Insider Mike Sando has put together grades for each team and ranks the Bills within the top third of the NFL, although they're not among Sando's best-performing teams in free agency.

Sando writes that the prices for running back LeSean McCoy and tight end Charles Clay "arguably were extravagant" and calls the Bills' approach "very high-risk."

ESPN NFL Insiders Bill Polian, Field Yates and Matt Williamson also weigh in with their takes.