I'd say this one is priced a bit too high considering that it has some usage marks and from a user (non-collector) perspective the B1 was, according to internet lore, a bit more 'rougher/aggressive' than the second batch that came out.
It's near impossible to put a 'correct' or 'appropriate' value on an item that is no longer in production.
The usual answer is that "it's worth whatever people will pay for it" and there is of course some truth to that but looking at past history one can at least get some ball park price trends.
Under $300: a great deal
$300-350: very tempting and would sell immediately
$350-400: Getting pricey but not unrealistic if condition is good and comes with box
$400-450: Premium price. Expecting NIB/NOS
$450+ Too expensive
This one is $515 + shipping
The above ranges are as subjective as they possibly could be and should be taken with a huge grain of salt
Wow! if someone this side of the pond bought it with postage and duties etc would work out in the region of £450,
I would want an accompanying barber with it to shave me. Too much.