10 years old doestn't mean to say that it is worse than a new one. Might sometimes even be better. (disagree, please let us know).
The thing is that in ten years a lot can have happened (dry, wet, valves, strong arm, et cetera). Ask Glenn, he is an expert on these accordions.
This was Tom Q's box.. and is a winner all the way..it has 3 day return policy,no shipping charge, and was considered by Jr Martin to be his top-of-the-line box back in the day.. note it has varnish finish, very soft, fast keyboard action..