Recently upgraded to 6.7 tubes. These are suppose to only have 20-30k on them, not sure.
Have no idea what these are worth and figure if someone wants/needs used cross-over tubes they are needing all the help they can get. Therefore, if you cover the shipping I'll put them in a box and send them your direction.
Now if you are just going to scoop them up just to resell then booo on you.

I think these were Industrial tubes but unsure. It says "FPT" on them and dated from 08