Though not really an answer to you question, I (coming from the faction of aviation who tend toward type certified aircraft) would caution you that a quality amature built aircraft will probably cost more than the nearest equivilent type cerified aircraft. If you're buying amature built to save money, you probably won't in the long run. And, always ask, why is the seller selling? If it's such a good plane, why do they want rid of it? Sadly, some pilots must give up flying for various reasons, and they sell. Other than that, be cautious of someone perhaps dumping out a troublesome or hard to fly aircraft. At least with a type certified aircraft, there are manuals and standards of maintenance, which can be checked by inspection. If it's amature built, you better aquaint yourself with someone who knows that particular type well, who can advise you away, if that were to be appropriate.
If it's your first ownership venture, buy an aircraft which is well known. It'll be easier to maintain, and insure, and getting to feel comfortable flying it will be easier. Once you're an ownership pro, go shopping for the exotic types.
My two cents worth after owning Cessna for 21 years. Amature built owners slag on if you must!
Pilot DAR