Post by Claymore
Spares may well be hard to get hold of as i would think you would have to get them direct from Hudson as i have never seeen spares up for sale for an AK.
Your best bet is contacting Francky or shazhib (members of this forum) who are in japan, if they cannot help then you are out of luck, that said for that price is might be worth buying as in the future Hudson may well have the spares (if they dont have them now) and shazhib or francky can keep a watch and see if spares come up.
One point however the Ak is notorioulsy bad to get to fire well so even with spare parts it may not work that well, as the Japanese guys say "its a HUDSON" not noted for great firing but very accurate models and still worth owning at the right price,