The cost I heard for the locos wouldn't be far off what one would expect to pay for Newbuilds of the same designs.
The condition of both locos is unknown but most likely poor. Shane is on her original boiler, now 76 years old, it probably requires a heavy repair if not renewal. I don't know how old Tyrones boiler is but if it's the original it's now 120+ years old! I believe the standard of maintenance in Shane's Castle was good. It went to nothing when the Giants Causeway was taken over and so both locos are now out of service.
It's a great shame as both locos are utterly ideal for the Narrow Gauge preserved railways here. Light and powerful industrials with a fair turn of speed