The previously discussed Columbia Crest 2002 Two Vines Shiraz (see link below) is on sale at Bell's on M Street for $5.99 (bottle price). They have several cases.
I don't really see the raving about this wine, though. Opened a bottle of it the other night and found it fairly characterless. That said, I think my expectations may have been too high-- it's certainly pleasant drinking for a very low price.
If you're looking for the 2001, which is tough to find (this is the vintage that won the Wine Spectator award), it's at the Sterling Total Wine for $10. Haven't tried it yet, though.