Yes they are very similar to an appraisal except without any liability from the agent, and they usually have to come up with 3 seperate values "as-is Low" "as-is High" "Suggested list price" and "repaired value" if needed as well as "repaired list price". All for $38.00. I recently looked at a series of BPOs preformed for a large lender and they wanted 3 closed comps and 3 listings as well as the whole market analysis, number of direct sales in competition, number of listings, declining market analysis, monthly percent of decline, etc.
I don't think I could do this for less than $350.00....