With regard to buying on Ebay, it's my favorite shopping channel. I've been buying for about 14 yrs, and have bought everything from a back scratcher to a b&m supercharger with the latest being a new ( honda brand) waterpump for a wing for 69$. It isn't always cheaper to buy from there but if it is unusual, then someone is either selling/or going to be selling it.
ALWAYS--- check the feedback.