I wouldn't chance selling it -- or, if you do, at least hold it for a long time. A company that offers such deals may also have someone watching Craigslist, etc. to look for this type of thing. Chances are you wouldn't be caught, but someone will, and they're going to make that someone an example to prevent the rest of the company for doing this same thing.
You have a vaccum right now that works? I'd keep using the one you already have, and I'd put this new one away in the attic until you actually need it -- then you'll have it waiting for you.