That said, personally I am not willing to pay that much for a STG (sorry). But I know others would and do pay even more for a PCB of it.
It is a very quality game and has several modes. If that is worth it for you, it's up to you.
Several other Cave games (and Crimzon Clover, which is not by Cave, but like a spiritual successor) have similar modes, so perhaps try one of those first.