An eyelet at the dropout of my chromo Bianchi San Jose frame has broken after about 5 years of use. It is still intact on the rack bolt, but snapped off the dropout. I don't have any friends with welding hobbies, so what would I expect to pay to have someone replace the eyelet? It seems like something pretty tiny and simple to weld on, but I know nothing about it. The bike takes a commuter beating and I often have quite a load on the rack, so I wouldn't want the fix to be particularly weaker than the original condition.
The rack is still usable on the bike at this point since the eyelet bolt rests on the dropout where the eyelet was when I have a pannier loaded on that side. It just clanks routinely and annoyingly on rough pavement and bumps and I assume the bolt is going to break off eventually.