I've had ribs since 1992 and am unfamiliar with the brand. I would ask where are they made and by whom, also, are the tubes PU, PVC or Hypalon. Hypalon is your best bet for a quality set of tubes that will last a long time and can easily be fixed if needed.
Before I make a decision, I would want those questions answered. Also, can the owner give you a few current users to call? Last but not least, have you sea trialed the boat?
I know I haven't given you any answers, but I hope I have given you questions to ask.