I have had success in stopping sheriff auctions in the past. I know of 3 techniques, but I am always looking for more b/c you cannot have too many weapons in your short sale aresenal. The 3 that I know of:
1. An offer, even if it is a low ball, can stop the auction.
3. Faux bankruptcy where you can file and then withdraw before it becomes final (this is an absolute last resort and I do not really recommend it).
4. Begging? - Haven't tried it, but I guess it could work if you found the right person.
Any other tips or tactics are greatly appreciated.