Thanks for the input! I will be staying away from that "unknown" R&C.
As for my Martin .... it is actually a stencil, says Wurlitzer on it, but is definitely a Martin Handcraft. I can tell by how it feels and examining it closely that it is a good solid horn and no doubt one of the best made, 80 years ago. The 2 techs who looked at it also agreed that it is a Martin Handcraft and great quality ..... BUT ......
I had it serviced after I bought it and still am unsatisfied with the lower range. I can hardly get any sound from the low notes at all, even tho the mid and high registers sing loud and clear. I am thinking that I would have to just have it completely overhauled, starting from square one, to get it set up to my liking. And I don't want to spend that kind of money on it, especially since it was supposed to be already "overhauled."
So if I decided to sell my Martin stencil, I would want to get out of it what I have put into it, as right now it is frustrating me.