This seems to be something truly awesome!
Apart from the impressive technical feat, it's got relatively promising commercial potential too. UAE on every platform with PCI slots, Amithlon, heck anyone with the need to read/write something on a crapload of different old floppy formats, using the el-cheapo floppy drive they've already got installed.
Plugging in that nicely cigarette-tar yellowed keyboard with the LED glowing friendly in the caps-lock key and no Windows symbols to some nice modern hardware is tempting too. And the old Wico joysticks... And those old electronic projects that should go in the joyport...
Maybe some musicians who are looking for a SID-station could be interested as well.
85 Euro is not too steep either.