You guys should be lucky to live in the US.
Here a lot of movies are unreleased yet, still not on DVD, and sometimes the they have very poor quality.
I have some US DVDs in my collection because the movies are still unreleased... LEXX for example. We have 2 Double Features with Part 1+2 ans 3+4, but only very strong cut to a FSK16, that's like PG13 or something...
Sometimes DVDs are out of print, so it is impossible to get them and the old versions are expensive as hell, like the Mighty Ducks trilogy. However, it looks like Disney is not interested to re-release the movies around here...
And sometimes we have to wait forever for a movie, so some unofficial labels produce bootlegs and sell them for very lucrative prices... Turtles was one of the movies. They decide to release an official version after the bootleg was sold for years. Same for some horror movies like Childs Play, Jason goes to hell or Nightmare (there is still no official unrated version of Part 1 and 5 available here) .
Another thing is the dubbing. sometimes they change it to a new. That isn't such a big thing in the US, but here we always want the old dubbing. It took several years and an online petition to bring "The little mermaid" from Disney back with the old voices.
I watch mainstream hollywood, so I don't know about all the B-,C-, whatever movies, tv series or which are still unreleased, but I'm pretty sure you guys have a better selection than Europe (except UK).
I'm still waiting for a german release of "Boy meets world"