DPC Prints is on online shop that sells well done, glossy and matte photographs of landscapes, airplanes, sports, flowers, you name it, they've got it. They are HUGE. Prints can come in many sizes (from 4"x6" to 16"x24") and are extremely affordable (@ $8-$40). (Thanks, Leslie!)
Leslie says: For really cheap original photos, there are some lovely ones at DPC Prints. (There are also a lot of awful ones, so you do have to spend quite a bit of time browsing.) I framed a large black-and-white one that I bought from them last year, and everyone always asks where I got it.