I did look at the link, but just posted what I've been told previously.

Personally, I'd just buy one through ebay, as that way you get some reasonably good protection if things do go majorly wrong. Try some best offers via a few different suppliers, and see who'll give you the best price.
Although having just had a quick search, it looks like several of the sellers don't have stock available so have bumped their prices up to keep the listings active without selling anything, so you may need to wait a week or two until new stock arrives, before you get a few more sellers to compete with.

I'd only go off ebay, if it was a supplier I knew was good. Avoiding ebay I'd be looking for at least a 10% discount, as that's what most sellers will be paying in ebay/paypal fees.