How much is it worth

[8buck]

A brand new in box with all paperwork u.s diver conshelf 21 never been used, brand new reg... It was just given to me this morning by an older man checked his c-card and saw his b-day was 1928 never met anyone with a b-day that old, he bought this reg new and left it in his home...

 

[Poseidon8118]

Your best bet is to check ebay...I would say maybe $100.00 brand new maybe more if someone collects them.

 

[Groundhog246]

Some of those were shipped with poor 2nd stages. The plastic would crack around the hose connection. US Divers replaced the 2nd's under warranty. I don't know if there's any way to tell if it's got the good or bad 2nd stage.

Aside form that, I have 2 Conshelf 21's and a Conshelf SE set and I love the regs. Great performers and I've never had a free flow, even with water temps in the mid 30's F.