By football, I'm assuming a soccer ball over here in the U.S.? While the ball is unique I prefer lps or photos. But we need to see the graph.
a rushed signature but 100% genuine, is this ball also signed by the team? if it is I think I've seen it before
I think the signature is probably good also and he squeezed it to fit the panel. Offer him 200 pounds maybe,then go up from there? Not sure on price.
robert plant signed wolves items are not very desirable from past experience, I would say this is worth £50/80 believe it or not and I'll be very surprised if he doesn't accept that offer...