For anyone who has been working in microstock for a few years, plus reading the forums here should have a pretty good idea what their work is worth.
I don't see a need to lower my prices to what my actual payout would be, let's say at Stockfresh for example.
I don't have to charge iStock's prices either but somewhere in between.
After all, charging "realistic" prices guarantees that, by keeping 100% of the funds, the money will be spent wisely on new high quality content that the buyer came for in the first place.