Sorry, looking to sell this with the remaining tank, would have to be a significantly better offer than that to tempt me, especially given the current supply and price of these regs.
Seriously? Subtract the sum I have just sold a bottle on its own for from the price I am asking for the reg with a bottle, then add 50% to come to roughly the price i would accept!
FYI, its a CP high pressure reg with an output of ~ 750psi and would be ideal for your egos.