It all started with a $20 purchase of a large quantity of lab glass at the UW-Madison Swap Shop. “I wanted to start a business selling things on eBay,” said Rhett Roeth. He had no idea what types of glassware were in the box, but when he picked up the first item, he realized he was on to something. “I knew the piece would sell for more than $20, so I earned back my investment with one sale.”