Weird stuff

So for various weird reasons I won't go into here, I have a 1978 Sports Illustrated poster of Pete Rose that was autographed in some kind of thick black marker by him. ("Best Wishes - Pete Rose.") There's also a similar-era jacket, but it's probably a few years later. (1982? I honestly don't know. I only know the age of the poster because it's printed in the margins.)

I know at least one or two people who read my livejournal know baseball things, so: any of you know about stuff like this? How much it'd be worth, stuff like that? (I say "how much" rather than "...if anything" because Pete Rose signatures seem to go for $20 on eBay, but most of those are much newer.)

Anyway, I was just kind of wondering. If you know, let me know. ^_^