Try your local Border's store:
This is a boxed set of four movies (City Lights, Gold Rush, Modern Times, Great Dictator)
http://www.bordersstores.com/search/...srchType=Title
It's $50, which is a good price for the set too. If you don't want the other three, email me and I'll buy them off of you for $40 plus shipping. (I already have City Lights.) The store will likely have it mispriced, so print out that page and bring it in with you. If your local store doesn't have it, they should be able to get one shipped in from another location if any of the other stores, nationwide, have it.