Can't imagine it would be fake and he would risk losing his feedback score on one dodgy shirt and a bit of money....
He's being checked at the moment and if it's fake, his ebay account will be closed. I've seen one of the shirts, I have three promotion shirts with Dawson's signature on and this one matches, but the photo is the same one for each listing, which looks a bit dodgy. If it does turn out to be dodgy, I can get his personal details from ebay and we can all go wee through his letter box.
I asked him why he uses the same photo for each one and he said because he can't be bothered to keep taking pictures of the other shirt OLM he also said he can send you proof of Robert Koren signing it if you like
I got Geovanni to sign my boot bag when he visited my college a few years ago. I reckon it's worth millions by now.
I have signed photo's of Thierry Henry, Dennis Bergkamp and Robin Van Persie that might be worth a few bob...