[austenallred]

It would be really helpful to see some examples of feedback. Are they going to pull stuff into photoshop and say "actually do this?" or "Tweak this CSS to say this" Or am I going to get back "This page is too busy. I don't understand what's happening." The first is highly valuable to me, maybe (but probably not) worth how much you charge. The second isn't worth much at all.

[charles_dickens]

That really depends on the designer that is giving feedback. Some people might edit some things on Photoshop, others might send you some hand drawn mockups or just write you some notes on your designs. You can always set the conditions upfront with the designer before paying him for feedback.