Pictures and maybe we can come up with a ball park. My Ava is a Doc. Depending on the condition I'd say in decent condition around $1500-2000. Proficient Billiards is showing one that looks somewhat used and asking about $1500. You might want a figure from Scott at Proficient ...get in touch...
Uniloc since 2000.... Zero problems. Probably easier to maintain than any other joint pin for lack of threads. My favorite choice. Nothing to clean..no reason to clean it unless the case is filthy, full of dirt and collects on an unexposed joint pin.
Hey you young ones.... buy Tom Wirth's One Pocket A Game of Controlled Aggression ...... it is a definite future collectible... It's one of the best 1p books ever published.