Generally appraisers do not use Short Sales or Foreclosures in the appraisal process. However if there are no other properties to choose from they may have to.
In my opinion if you do not have to sell right now I would not sell. I think we still have some pain ahead of us as far as Short Sales and Foreclosures are concerned but with the gov't putting a lot of effort into stabilizing the economy the first thing they need to stabilize is real estate. It is the life blood of our economy.
Rates are at a historic low and it seems like buyers are getting back in to the market. It's a tough call but I think the market will be better in 2 years than today. If you need to sell before that point you cannot expect some low ball offers.
Unfortunately I do not know the names of any of the auction companies but I hope this was a little helpful.
We are thinking about an auction so we can get out fast and still keep our equity.
http://tampabayhousefinder.com/shortsale.htm (copy the URL into your browser)
it should shed some light on the situation.
Feel free to give us a shout if we can be of further assistance.