If you've ever trolled eBay for vintage bike parts you probably already know of Bicycle Heaven. I'd say Craig is one of the biggest dealers of vintage Schwinn parts on there. When we were in Pittsburgh visiting and I found out he had a shop I had to go check it out.
The store/museum is in a rather nondescript industrial area, but he has quite a few signs marking it so its pretty easy to find. Once you enter, you can see why he chose this space. The first floor is a large space where he keeps the highlights of his collection and his office. He'll then direct you towards the back through a door and up some stairs. That's where the half dozen other rooms full of bikes, frames and parts live. I make it a point to visit any bike shop I can, and I've never seen anything like this before. While his collection is mostly american bikes and overwhelmingly consists of Schwinn's, it's an incredible collection that spans decades.
Not everything is for sale, but if you're looking for something specific I have no doubt he has it or can find it for you. It's also worth spending some time talking to Craig, he has some great stories about his time collecting and the bike he has.
No website, but they have a Facebook page:, which Yelp wont let me set as their website - http://www.facebook.com/pages/Bicycle-Heaven/102283623199515