Thanks for the PMs, which I replied to separately. I never discussed the option of keeping the camera and what price that would be. I only asked to replace it with the correct camera but they say they had no more and didn't know if they would get them back in. I can only assume that someone bought a E-P2 and got an E-PM2 instead.
I also assumed that if I kept the camera I'd still pay the same price. I could try negotiating with them and get it for a cheaper price. After reading some of the reviews of the E-P2 it seems it was packaged with the VF-2 and unfortunately that was not included in the box. I don't know if this is because Olympus had different packages or if someone lifted it from the box before sending it to me. It did have the 14-42mm lens.
So considering there is no VF-2 and this is a discontinued model, what do you think is a fair price for the camera?