Von Miller: Broncos $114 Mil Offer Is Insanely Low ... Says Sterling Sharpe

There's NO WAY IN HELL Von Miller should sign the $114 MILLION offer from the Denver Broncos ... because it's insultingly low ... so says ex-NFL star Sterling Sharpe.

Sharpe -- a 5-time Pro Bowler -- says the key to the the offer is the guaranteed money ... which, according to ESPN''s Adam Schefter, is only about $40 million.

Sharpe says with all the risks pro football players take -- including CTE and joint damage -- a superstar like Von needs WAYYYY more guaranteed money ... we're talkin' more like $80 MIL!