you are way better off searching classifieds and forums for a used bike, you will normally find sum1 who bought it and either it wasnt for them or they wanna upgrade already, and that will be your cheapest price. be patient, good things come to those who wait. a deal will cross if you look for one. normally factory warranty and everything will still transfer. there are a lot of sv650s out there, so im sure if you search u will find some. a dealer should be your last choice for a used bike.
however, i once bought a dirtbike from a local dealer, used, and the engine blew after 2 days. i had no warranty or anything, and they paid for 700 of the repairs, i paid 400. they lost money on that bike, a lot of money, and i will go back to that dealer when im ready to buy a brand new bike. they will charge you more, but if you find the right dealer, they will treat their loyal customers good