Mr Reasonable
Completely Unreasonable
It has personal value. I could probably get a lot of other cool artifacts for the same price, but one of the questions I'm having to ask myself is, "is this one $325 thing worth more to me than all the other things I could get for $325?"
Still debating that internally, but outside input on whether $325 is a fair price for this Seiyuu will help drive that decision.
I've thought about this, and I'd go as far as to say that if you're on the fence and can afford it, you may as well just do it. I slightly regret not going to a (free) meet and greet Miyamoto did when he was visiting the UK years ago. And I'd say it's better to regret wasting a bit of money (assuming it's not your mortgage payment) and having the experience than to regret not going and wondering what it might have been like. ...Assuming the money is truly disposable to you.
The worst that happens is that you waste some money on an underwhelming transactional experience, but you could hedge against that by planning to do some other things in the area, so it's just part of the day. Find out which restaurant is the best restaurant in the area or if there's something cultural to do in the evening, etc.