I've had no success at 2.5* or 3* in Metro-accessible suburbs of DC in both Virginia and Maryland (as well as DC proper) up to $100 for the first two nights of my stay (6/21-23). So I just decided to go with an excellent advance rate of $69 per night at a Holiday Inn Express in Camp Springs, MD, near Andrews AFB. I could get a 2* for less via Priceline, but who knows which one I would get (or how disappointing it would be) -- this hotel, at least, finished room renovations just a few months ago and is cloes to the Metro. Looks like there's simply not much availability via Hotwire/Priceline for weekdays in June, so I'm happy to have gotten one night at a Hilton, and the first two at what I hope is a clean if not posh place that's near the Branch Ave Metro station. I know this isn't a Priceline win, but I figured the data about my lack of success can inform others.