I'll echo the comments of friend Al Petrak, recommending Movies
Unlimited [030311 MMDigest].  Their catalog is the size of most
city telephone directories, and their service excellent.  They
have a list of discontinued films on VHS which are special bargains.

There was a slight error in the URL given for them in the posting
on March 11th.  Here is the correct URL, which does not have a
space between the two words Movies Unlimited:

  http://www.moviesunlimited.com/

Best wishes.
Lee Munsick