You probably know how expensive it is to frame something. Well, I've just taken three artworks out of their frames, and am selling them, used, the frames with the glass, which could potentially save you hundreds of dollars. So you only need to buy new mattes.
Approximately 30x44" - silver metal frame, like chrome: $50
Approximately 26x35" - dark wood frame with gold-tone finish: $45
Approximately 23x35" - black wood frame: $45