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This one starts at $39,000. (www.auction.com)

Tomorrow, 18 District properties—several in Congress Heights, a few in Columbia Heights, Old City, Deanwood, Barry Farms, and Woodridge—are going on the block as part of the Department of Housing and Development’s second-annual property disposition auction at the Washington Convention Center. There are all sorts of rules associated with buying and rehabbing these houses and empty lots to make sure the city gets the most benefit from each (make sure to review the briefing presentation if you missed the buyers seminar on the 23rd).

If you’d rather not bother with all the restrictions, though, there’s an 85-property foreclosure auction going on just a few hours later at the Renaissance Washington downtown at 6:30 p.m. Unlike at the city’s event, here you can buy as many falling-down houses as you want, starting as low as $9,000. Most of them are in Maryland and Virginia, but a few are in the District, including a nice-looking condo on Upper Georgia Avenue. If you ever wanted to become a Washington metro area real estate mogul, now’s the time.