I am sure it will go for $250+ to some Japanese guy whose room can barely fit a SE/30.
What I want to know is can you solder in another PDS socket for ethernet? Personally a SE/30 is better off with ethernet then an 030 and no network.
For that card to work in a IIsi I would expect 2 sockets soldered sideways, but isn't the IIsi PDS socket 180 degrees different from the SE/30 socket meaning the adapter cannot have a 2nd adaper since it would hit the plastic case?