I definitely prefer reading stuff in English than in German, but there's a limit. Maybe I'll check to see if there are any reasonably priced French editions.
There are at least four books I'd quite like to own which have been out of print for a while now, and the lowest asking price is $135. I had one in my wishlist and when it was still in print it was priced at a more usual £9.
You can see this on Amazon marketplace in the UK, which includes US sellers - they'll typically charge four times or upwards of the UK marketplace prices for items which are easy to find.
They only get cheaper if it's expected they will have a life in the specialty consumer market (History Book Club, etc,), or be sold as textbooks for universities.