Located in Lafayette, Louisiana is supposedly Aprilia RS250 S/N 0001 in as new condition. The price seems market fair at $7,595. The seller doesn't list very many specifics but if you'd like a new bike for display or use, this looks to be a zero mile bike with brand new with original tires--although the seller states it has never been serviced in six years. See the ad on CycleTrader here.
Update: This post is pretty outdated. Check out these Aprilia's on eBay right now: