This is easy. The one I just recently got and showed in the last bought thread. Robocop Hot Toys thingymajig. It was £220 + £36 for shipping!
Second one that comes to my mind, was the Ultimate Edition briefcase set of the first 20 James Bond films. It kills me that I bought the Nordic version, because for some reason, they left out the awesome mini posters from it.
( *goes check the price from old emails* Well it was 320€.. close to the Robocop price.
I also bought the Special Edition boxset some years before that, but don't remember how much it was.
The blu-ray set that came out a couple of years ago, was a total bargain compared to those. :P