Agreed. Autograph Pros is top notch.
Allen, take a large close-up of the autograph and post it please. The image you uploaded is too small and pixelated to authenticate reliably from.
That's OK. You'll want a better photo. Once you get one I'll ask Mike Kasmar to take a look and tell you if he sold it.
Bruce very rarely sign guitars anymore, and his signature is nicer than usual. It should be expensive.
Similar sample attached for comparison.
Are you able to attach an image of the other signature besides this one you're considering? I wasn't able to find it.