I agree that it's a good price for what you get, but I do have some reservations about loosing the originality by installing these boards even though they are appealing from how versatile in the number of games they run. Off course others will have different views on this

That's a great price would probably spend that on parts to repair originals wish I had enough secret cash lol

Daniel - how much are you replacing!   40 pin connectors, a handful of drive transistors, some power resistors, blanking caps, a few buffer chips and maybe a PIA. A struggle to get near $300?