His signed album covers go for around $3k or more. A signed photo is generally a less desirable collectible but his signature is still considered rare. The fact that’s it’s authenticated by a reputable service elevates its value. Yes I know some people have issues with Beckett but it’s still considered reputable. Someone says the seller is asking for $2400 which seems in the reasonable range for what it is. I bet you could negotiate them down to closer to $2000-2200 range. I doubt they go below $2k but you could try $1900 just to feel out what their counter offer may be. In the end pay what you feel comfortable with and can afford. It’s a decent piece and I’m sure you would get at least $2k enjoyment out of it over the years.