You can check Craigslist and the For Sale section here at HondaSwap to see if anybody is selling one. As far as actually buying from a dealer though, you're not gonna get one for much cheaper then the websites that were linked to. Consider though, that a lot of those websites offer some type of warranty. If you just buy an engine from Jack Mehoff on Craigslist then you really don't have any idea of the mileage, condition, etc...