The 2004 Nikon D2x is a 12mp DX professional body camera sold new for $5,000.00 and can be purchased today for about $200.00 or less. You can still find some with lower shutter counts. While it has some limitations, such as keeping the ISO low, when shot in RAW and the files processed in Nikon's NX Studio it can still produce 40+ megapixel files. Remarkable and fun to do. Here are some examples. Try it if you have never experienced Nikon's built in vertical grip pro body and still have some F mount lenses around.
Actually, you don't need to use a D2x body. Nikon's NX Studio will allow you to shoot any older Nikon camera in RAW and process the files to around 40mp. Magic. Old low mp to New high mp through software.