Pirate sells theirs for $140, what better price are you looking for?
Bicycle Engine Kits
Spend the extra $10 or $20 and get the customer service that Troy is famous for. Good luck trying to get anyone on ebay to contact you back about misplaced part, broken parts in kit, etc. It's not worth it, go with Pirate you won't regret it.
And by the way Troy, if your reading this, thanks for my chain last week. Ordered on Tuesday, got it on Thursday!!! What a life saver. Thanks so much.