dude, all you have to do is remove the lowering links/straps, remove the swingarm extension (if there is one) and take a few links out of the chain. when I got my K5 GSXR 1K it was stretched; took me all of 45 mins to remove the straps and lowering links. paid $25 for a set of stock dogbones to get it back to stock height and had a friend remove the extra chain links.

I would however offer a fraction lower than the asking price since the bike has been altered and obviously been to the drags.......