There really isn't a way to give you an exact year since it's been painted.
ask the owner for a list of mods, and what year it is.
Pesonally... I don't buy skis with a bunch of mods. You don't know if they were done right. and even if they were done right... they shorten the life of everything. So... there is a higher probability of parts failing. Also, there could be drivability issues since everything is designed for top speed.