These don't look too good to me at all ... the metal deposits on the glass visible near the bottom are a sign of heavy use. Plus, I have found that Amperex PQs tend to be prone to noise after long use (at least, all 6 of mine are too noisy to use). I basically refuse to buy used 6DJ8s/6922s at this point, since they are such a "risky" tube noise-wise. JMHO!
If you can, try to find some that are new in box! I've found a lot of bargains that were 100% new

FWIW, I have about 60 6DJ8 tubes right now, new in box ... I sold all of my non-noisy used Amperex for <$10/each, and put the noisy ones in a box for "testing" purposes or for sticking in old test equipment.