mixxalot, here’s a search link for you for East SD County. Some of these homes are in pretty good shape but only the first 12 listings (priced low to high) are listed at less than $500K.
In addition, 5 out of the first 12 listings are “short-sale” listings, meaning their lenders may not accept an offer under $500K (or anywhere near what the wishful seller and their agent) are hoping they accept.