Hey Rich...Wow what a nice set up!!!
Unfortunately, the open market does not see used tank that way. It comes down to $$$$$$ and they don't pay more than $0.50 to the dollar. Life is easier if you sell it as a whole unit, but you get less.
So don't get mad
at me, but this is what I think the set up is worth on the open market...
$650 to $700