It may be new and unopened. But how old is this model? Quick guess: 1985
In 1985 you got 239 Yen for one $.
Kit prize was 34,000 Yen = 142 USD.
The asking price / starting bid seems completely ridiculous to me.
Other than that, nice looking vintage model. The lack of wing taper doesn't need to be a bad thing.
There's a lot of slope plane to be had for 300 bucks, or even far less...