Interested in thinning out your movie collection? Here’s where to sell those used films for maximum profit.

If you used a service to convert a disc to digital, or if you have a movie that came with an UltraViolet copy, be aware that it may not be a good idea to sell your original copy of the movie after you convert it.

While it’s still a gray area, selling a physical copy of a movie could be interpreted as a violation of the license agreement or copyright law because you still retain a digital copy of the movie. This means that two separate households would have access to the movie, one via the disc and one via the digital file, which is not what the studios intended. The law still has some catching up to do on this one, but it’s probably best to avoid this issue.

If you don’t want a bunch of movies taking up space in your home, switch to buying digital files. They don’t require shelf space or dusting, and they won’t leave you in murky resale waters.