You have to be realistic. I don't think anyone (IMHO), could honestly believe they would ever receive the listed price for their domain. It would have to be an extremely excellent domain name to do that. The reserve price is much more realistic.
I really think you are worrying about something you don't need to. I have had at least 25, maybe 30 domains listed on GreatDomains. I HAVE NEVER SOLD ONE. I HAVE NEVER EVEN RECEIVED AN OFFER ON ONE.
I currently have 8 names listed, from $5,000 to $25,000 (Programs.tv). I would be estatic to receive an offer for the reserve amount,and wouldn't hesitate one second to accept.
Besides, I don't think you have to accept the reserve price, read this from GD:
What is the minimum offer?
The seller has determined a minimum price that they would be willing to sell the domain name registration for. This reserve price varies by seller. Use your best judgment in deciding a offer price when you submit your offer. Remember that the offer is only the first step in the negotiation process. GreatDomains will work with the seller and buyer to ensure the final price is fair for both parties.
Of course, IMHO.
Frank