Limit on Loss Mit Fees?

[Tom Medwin]

I'm just wondering if there's an amount that is too much to charge for a loss mit fee. If the buyer agrees to pay 10-15k for a good deal on a property does anyone think there's an issue with that, either legally, ethically, or in terms of putting it on the HUD on the buyer's side and having the short sale lender approve it? Lastly, if it is an FHA short sale would that affect anything? Thanks