So you are looking at a repaired gun which the repair is stable but not invisible or even good looking right now. First thing to figure out is it a solid repair? I'd say yes because it is a fairly old one. Second thing is what does it look like under the lock plate? Don't buy it if you can not see what is looks like under the plate. It could be just the horn or half the head of the stock. You don't know until you see what is under the lock. And lastly could you do better? Well that is an old repair that has lasted for sometime. Perhaps that is as good as it gets or at least as good as it needs to be.

If you have to restock that gun it becomes a money pit. If you can live with the repair it is worth the risk if you can evaluate that level of risk. Otherwise just keep on looking.