If you like Polaroid manipulations, jump on an old pack-film camera while they're cheap. There's a new manipulation technique that's appeared in the past few months, Polaroid doesn't even have it on their web site yet (it was invented by an f295 regular, who has since rung a useful and interesting change on pack-film image transfers as well). In broad strokes, it's done by peeling the print and immediately sticking the negative on a plate of glass, then manipulating it from the back with similar tools and techniques to that used with Time Zero film. I don't know if it works with color or only B&W, and since it's a negative the result must either be rephotographed or scanned and inverted to obtain a positive, but depending on the subject matter, being in negative might not be a huge issue (of course, if you have a closeup kit, you could also photograph a negative on a light table in order to use this technique with a positive image, as well as make multiple copies; it could also be used with a Vivitar Slide Printer and a negative in a slide mount).