I have a lot in the downtown area. Currently in an area which might be converted to commercial in the next, oh say, 7-10 years. It is currently surrounded by residential homes on all sides. My question is really about the age of the comps. I have very limited data, so the comps I do have are dated as way back as Jan 1, 2002. The area is an older established area, like most downtown residential areas, so there are not very many vacant lots that have sold or available. If I'm able to use these sales I do not think a time adjustment is warranted. How far back can I go and what hurdles will this possibly cause once reviewed by an UW?