How to value in market with huge price swings

[Joseph Walsh]

Hi all, I am looking to refinance a possibly under-water property.  I say possibly because the particular neighborhood has some pretty wild price swings on seemingly comparable houses (I mean swings of 100% ore more!).  Much had to do with a rash of established owner deaths, compounded by foreclosures piling on the "low" end, but more "normal" sales at the higher end the past year, most recent listing are right where I hope to be.  Is there any way to affect the appraisal process, or is this a "luck of the draw" type scenario.  Is it possible to seek out lenders known to be "generous", or would a broker be better?  Or, am I just gambling with the appraisal fee and hoping for the best?  My first step is going to be to ask my realtor....any other thoughts?  The refi is a veritable must.  Right now it's a loss property and just "fixing" the rate would be profit. 

I'l' be doing the obvious of making sure the house shows well.

Thanks, 

Jay