Hello from Calgary, I just bought a 49cc engine kit on Ebay for about $170, and with accessories and replacement parts it came to about $250. I'm totally addicted! I drove it to Calgary's downtown yesterday, and I'll tell you, the stares I got from people...and questions too! If I ever get time, I'm going to put these kits together and sell them. So many people are interested, and it's (somewhat) easy to put together. It took me about 8 hours, and some extra parts to get it done, but it was worth it!