So you're saying that 2k keys that could be bought at any time mean the player has been in the community for some time?
If the 2k keys were bought via a third-party, which they were, then surely they were also bought in numerical order?
ID 2000 first and 2999 last?
So ID 2190 is still an early ID, likely sold quite a while ago. I'm pretty sure that it's an old one. Not as old as a 3k ID, perhaps, but still not a brand new one.