Spyder Dennis Jarvis Pro Shortboard

[Jordanlev]

I just picked up a short board at a yard sale for cheap and when I got home I realized that this board might actually be worth a lot of money, but I don't know much about surf boards. It's a fiberglass 6' 4" Spyder board and it says Dennis Jarvis - Spyder Pro Series. I did some research and it seems like Dennis Jarvis is and ex pro that makes handmade custom surf boards. The board is also hand signed by Dennis Jarvis. I attached some pictures (sorry they're backwards). I'm not trying to sell this right now, I'm just trying to figure out what its all about and a good estimate of what it might be worth.