Nothing really in the immediate area that I have been 2
If you are looking for older stuff I'd try Leons just south of Culpepper on route 29. Mostly older stuff here. There is also a yard just North of Culpepper, Sonnys a decent mix of old and newer here, good prices.
If you head down towards Fredricksburg I've been to several there off Route 1 that are pretty good. Think one of them was Banks
If you are willing to drive a little west into WVA, lots more to pick from. Courtneys in Harpers Ferry, Cody's in Leetown, Ernies in Martinsburg. there is also a truck yard south of Martinsburg on rt 11, never been there but friends have said it's decent. Lots of others up that way but these are the largest.
I haven't been to most of these in about a year, but they always have a decent selection of vehicles. Prices cheaper in WV.
Actually there still may be one here in the Manassas area, there was one on 234 south, just below the Prince William county landfill, heard they were trying to close it down but it still may be there
Also there was one on route 1 north of Leesylvania State Park. Never been to it and only driven by when it's been closed but looked to have newer stuff. It maybe gone as the area around it is starting to be redeveloped
The ones in Culpepper and WV are, the ones in Fredricksburg I think are haven't been to those in 4 years or so but I think they are. the one south of Manassas and the one on Rt 1 I've never been to so I don't know, but I would assume so.