Hi Paul79, you do have a very valid point, and I may just get these tubes any way, If you do not mind me asking, How is it that you know so much about tubes?, maybe you should disclose what audio company you have and what you sale, none of us mind, I have looked a couple of places for the mullard 10m and the CBS 7318 with no success, the couple of places is well regarded as having the real mccoy tubes that most people are looking for, and they have extensive testing equipment, an example of such tube dealers is Andy Bowman of vintage tube services, and another is Jim cross of vacuumtubes inc., and Jim Mcshane, just to name a couple out there, I admitt though, I have not talked to Andy Bowman yet, could not get him on the phone, LOL!, so I do not know what he has or can get, paul, you seem like a good guy, but from what I have been told about the tube market, you can never be to carefull!, who knows, we may still do business on some tubes you sale, you have been very good to me here shareing your knowledge of tubes, that my friend does go a long way with me, cheers.