False advertising of expensive special tubes?

I have a couple of Ebay E-mail alerts for particular tubes when they are listed. There has been an enormous number of 12AU7s being sold as the special 7316 variant. If a person knows how to tell wheat from chaff OK, but what is our responsibility to those don't. Sometimes the worst looking tubes are the real McCoy as they were developed for sensitive computing and medical electronics many are pulls from Beckman , H/P et. al.
I'll fill you in it is a Philips product and were made only in the Holland Heerland plant they were acid etched with a right triangle indicating so, the rest of the etch contains a "Ct" on the top and second level on bottom of the code with an integer for the year. (late 50s and early 60s.)
So should I bother pointing out the deluge of 12AU7s given that name or just assume the buyer should know and it is Caveat Emptor? For instance there are regular 50s 6SN7GTs being called B65s. I know the sellers just want eyes on their products. What do you think?