I'm trying to do some analysis using a couple different point layers.  For explaination purposes these are house addresses.  What I'm hoping to do is to do a search whose criteria is that there is a standard deviation from one point to another.  For instance, I want a search done that takes all the points (addresses), does a radius search of 1000 ft., look for other points within that radius that have a selling price (table field) of +- $15,000 (or some stated standard deviation) from the original point.  Does this make any sense?  Help?