I hear lots of people wanting pro features (build, weathersealing, AF, fps) in the lower/middle end cameras. But few seem to consider the option of buying a used pro body. If you aren't too worried about the max # of megapixels, you can get some pretty decent bargains out there if you are willing to compromise a little.
For instance, in Canon land, we have:
1D (4MP, 1.3x crop)
1Ds (11MP, full frame!)
1D II/IIN (8MP, 1.3x crop)
1Ds II (16MP, full frame)
The original 1D may not look good on paper, but the autofocus and fps performance is still quite up to date. They are built well enough that you can hammer nails with them. The shutter will go for 200-300k usually, and costs $300 or less to replace if needed. I've seen them go for $400-600 lately. The original 1Ds is 11 megapixels full frame with a weak AA filter so the output from it is pretty stunning still. Yeah, higher ISO it's not so hot, but if you want a good performing full frame camera that can make very nice, large prints it's hard to beat for under $1k.
The Mark IIs are more of the same, a bit better, a good bit more expensive. Still, the 1D II is under a grand and for that you get pro AF, weather sealing, 8 fps, and 8 megapixels which should suffice for many.
In Nikon land, you can look at the D2X and such cameras which give you a lot of performance for the money these days.
If you want to go really quirky, a Kodak DCS/14n is like $500-600, 14 megapixels full frame. Yeah, it's a pain to use and a little weird, but the output at low ISO can still be amazing. Full frame landscape camera on a real budget? This might be your guy!
I don't know if it's people not wanting to buy used, the assumption that used pro camera = worn out, or what, but few appear to pay attention to these options.
Here are a few threads from POTN where you can see these cameras still performing well:
1D Classic Lovers !!! - Canon Digital Photography Forums 1DS Mark II Admirers, congregate! - Canon Digital Photography Forums 1DS MkI owners unite! - Canon Digital Photography Forums 1D Mk II and Mk IIn Owners Unite! - Canon Digital Photography Forums
Fun reading and maybe it'll help push someone over the edge.