I think this surfski was made by Valhalla or UP sport and I'm not sure of the age. 19'-6" long about 19" at the widest, and weights about 30 pounds. I am 6' and it works for me, but I wouldn't recommend it for anyone taller. It has some rocker and a stern hung rudder, things that they you won't find on a newer surf ski (like an Epic or Huki) as it slows them down a small amount. But the rocker adds stability and makes it better in waves, so there is a little tradeoff. I can hit about 6 mph with it and cruise about 5 mph, which are much faster than a typical sit on top kayak.
It is in very good condition cosmetically and structurally. I have redone the entire boat, had some damaged fiberglass professional repaired, painted it with a high quality marine polyurathane ($40 a quart), replaced the cables, added some attachments, etc. It is in good condition. It is not perfect, and there are some small paint and surface blemishes you can see close up and a few stress cracks that dont affect the integrity of the boat.
I like to equate it to a 50's corvette: not perfect or the fastest, but classy and still pretty fast. Good for ocean or bays. $400. Located in Carlsbad. Email if you want to try it out rlhemmen@yahoo.com