Well, you sound pretty determined to sell, so I won't bother trying to dissuade you. However, I can tell you that I sold several soaps to friends before I completely understood the process, and I regret it--not because they were unsafe, but because they were poor quality. I personally feel bad that I took money for poor soap when now I know I can make kickass soap. Rancid soap isn't dangerous as far as I know, but it smells nasty and looks ugly. YMMV.
It also is possible to make unsafe soap, even if you've been doing it a while and think you have your recipe and process down pat. Just this past weekend, as a matter of fact, I made a lovely batch of goat's milk soap with shea butter for an upcoming Christmas craft fair. At least I thought it was lovely--smelled divine, and my test piece lathered well. I cut it and noticed a few suspicious whitish specks with a tiny bit of fluid in several bars. Because I didn't have ph test strips, I licked, er, tongue-tested, a bar and got zapped, hard. Then I remembered that some of my lye had crusted in the bottom of the lye pitcher. I thought I had broken it up and dissolved it all, but apparently not. I shudder to think what might have happened had I not tongue tested it.
Anyway, to your question--yes, you should be able to rebatch it, but you may not be satisfied with the result. Is this cold process soap, or melt and pour? I know nothing about MP soaps, but my experience with cold process is that you shouldn't expect it to look pretty. I also wouldn't bother using any sort of detailed mold, because it's going to be more like mashed potatoes than your smooth lovely original pour. It will have to go through an extended period of cure because it will have extra liquid in it from the rebatching process--if you add more liquid to make it smoother, then that will extend this cure time even further. Some people use sodium lactate to help with the rebatching process, but as far as I know, nothing will really restore that original smoothness and detail. Sorry.
Lastly, if you're still wanting to sell the soap and don't have time to really hone your CP soap skills, maybe explore some melt and pour projects? That way you can put your creativity into the project, but don't have to wait for the soaps to cure. Bonus, no dealing with lye!
I second this suggestion. If you're committed to providing soap for your event, you might consider melt and pour. SoapQueen has a ton of tutorials that really showcase some of the lovely, creative things you can do with MP soaps:
http://www.soapqueen.com/ Or there's cookies. People love cookies.
Please don't take any of this as criticism, though--just people talking from sometimes regretful experience. Most likely your soap will be fine (although you may want to consider how you'll feel if a co-worker gives your possibly-not-ready-for-prime-time soap to someone special, and has it turn rancid on them. If that doesn't trouble you, then
probably you're good to go).