TL:DNR ..... Do not bother, just haggle the amp down and get something else from ebay. There are plenty of decent GE 6DJ8s for like 20 bucks. Or you could offer him 260 for the lot.
They are good tubes, but they are not worth 40 bucks IMO.
The Orange Globe 1967 tubes are made by a company called amperex. They are decent tubes, but that's about it.
A lot of head-fiers have blown the up to be like THE best tube for the lyr which simply is not true.
You see what has happened is that a few people who roll tubes all day long mentioned that they really liked them. So naturally 1200 other stupid morons decided to follow suit without doing much research. They basically bought the orange globes and ONLY the orange globes.
So when they swap out their crappy stock tubes with some decent ones, everyone starts to rave about them.
Here is what the golden globes have to offer. They are pretty clean sounding. Tubes can sometimes be microphonic and add noise to the system. This means that your headphones will produce a ringing sound which is obviously bad.
Most tubes do not do this. Only a select few do.
But amperex was commissioned by the us military to make some like ultra low noise tubes specifically for military use in things like radar, and telecommunication.
Tubes like these get the prefix JAN which stands for joint army navy.
Thats what these tubes are. They are nothing more than a very fine tuned tube with above average specs.
But the kicker is, almost every stinking company made JAN tubes as well. GE, RCA, WE, Philips, Tung Sol, and so on all made JAN tubes.
You could even buy special tubes that have even less noise that were designed for computers.
I mean the list goes on and on and on.
But the truth of the matter is that the lyr really does not benefit that much from different tubes. Its more of a fun thing to do than anything else.
Here are the 4 sets of tubes you should be looking for period...end of story.
GE 6DJ8 (JAN would be nice), Mullard 12ax7, Telefunken 12ax7 smooth plate, RCA 6DJ8.
BTW, 12ax7, 6DJ8, 6922, ECC88, E88CC are all interchangeable. They are all practically the same tube. The differences in the naming scheme have to deal with patents and other annoying crap.