That's THE cheapest I've EVER seen a full set (with the manual) go for on eBay!! (or anywhere for that matter).
When you get it, take the manual out and start at the beginning...there's a LOT of vital information in the beginning that causes the videos to make sense.
I put the manual by my bed (I always read before falling to sleep). All I can say? Don't blame me if you start reading it and can't possibly put it down or fall to sleep...you've been warned! :)