If it is a side cover it wont be that bad. If it is a engine case... Do yourself a favor (unless you have mad motor skills you are not telling us about) and let it go. Sometimes when you find these spectacular deals, they really are too good to be true. I don't know about everyone else on here, but personally I would not be selling a 05 cbr for 2K if that was the only issue. For 176 bones I could fix it, relatively under 200 dollars would be my guess. After gaskets and whatever else might be needed. Then I would put it back on CL, rated up there with all the others. 3500-6000. So 2K does not make since for just a side case.