I have a bunch of 6SN7 types laying around. Anything particular in mind - GT, GTB, VT-231 - and what is your budget? Would you like a single pair or, if the price is right, a couple of different pairs to roll? I would tend to be at Ebay level prices (based on sellers with a decent tube history), and test on a Weston 981 III which is very reliable for 6SN7 types (and many others).
I might also trade if you have anything of interest laying around (tubes, shielded speaker cable, SACD/DVD-A discs, other stuff).
