Search for something. Then in the yellow box on the left side of the screen entitled search options there is an option called "Completed Listings". Check this option and press the Show Items button.
You're not wrong. Looks like they've both gone up over the last year. Not long ago someone sold a nearly mint DM-3 in box for �90 ($160) and I thought to myself, no way am I going to pay that. A few months later and it's impossible to find any for that price anymore.