Thanks everybody for the comments :D
I bought everything for 100 euros (150 AUD). Btw, I live in Nice, France and the guy who sold me the windsurf lives at a house next to the caravan ;)
Long story short, he told me that a tourist was the real owner and when he left France gave him the equipment.
The board is not in a good condition. However, I am satisfied with my purchase because I took also: 4 sails, 2 masts, 5 booms, 2 board cases, few fins etc. I will post details later.
I will weigh the board and upload photos as soon as possible to discuss if it is worth repairing