This place is totally ridiculous. This is the flea market to end all flea markets.
You can buy pretty much anything here - random '70s porn on VHS? Yes.
Random Nazi and Soviet Union memorabilia? Yes.
Old postcards (written and sent and received), books in all different languages, dishes and ceramics and pottery, tchotchkes & knickknacks - Yes.
You name it, they sell it.
This place is NOT for the claustrophobic or people who can't handle crowds of people, and if you're only looking for a produce/farmers' market on a Saturday, I'd suggest the Brunnenmarkt instead of the Naschmarkt for better prices and fewer people.
If you're looking for something completely random (or specific) on the cheap, and you can't find it elsewhere or aren't sure what you're looking for, yet, this is the place to go. And definitely, definitely haggle.
I found an excellent German-English dictionary here, in which the words are completely translated in the "opposing" language and that language's past participles are provided, as well as examples of uses and idioms, etc. It cost €3. read more