If there is actually a team out there that thinks AD is worth $25M ish/year, surely they would be willing to compensate the Rams accordingly in trade. If AD holds out for money, the Rams can just as well hold out trading him until some team makes a fair offer. Its not like the Rams would be forced to take the first lowball offer that came along.
Two first rounders are a minimum and they'd need to be in the top half of the draft, not from a team that's likely to pick in the 20s. If I'm the Rams, I hold out for 3 first rounders or 2 first rounders and picks from other rounds and/or starters in positions of need. The Rams need to make sure they get fair market value!!
