SamSpayed:
I think what he's referring to isn't really purchasing used clubs, but rather a back-door method for purchasing a new set of identical clubs for yourself: Find a player who has the (retired) clubs equipped that you want, then pull up their profile and click the Purchase button to purchase a set for yourself.
That used to work, on mobile, but it's been disabled by WGT for awhile now.
And the only advantage it really provided was to purchase some of the Nike equipment that got reduced by 5 levels before being removed from the Pro Shop. After removed, the equipment continue to show at its lowered level.
So, it was really nice for people around level 90 or so. For example, if they were at Level 92, they could purchase the old Nike irons through the backdoor that had been reduced to Level 92 while the new irons replacing the Nike irons were at Level 97.
At lower levels, there wasn't really any advantage. A player still had to be at the proper level. Players just couldn't buy anything, regardless of level. I tried. 😉
But as you note, the ability to do any of that was disabled quite a while back.