Once you start earning some money yourself, you'll find that time = money.
Same with being rich in WoW. I'm not particularely rich compared to the AH rollers, I only have about 50k cash and 200k in items (Shadowmourne q items, 5 Sky Golems and some other stuff). Do I need more? Absolutely not. What does that mean to me? It means I have enough money not to sell random crap on AH, so I either give it away if it's shit, vendor it if it's really shit, dump it in the guild bank if it's 90 BiS raiding prof items or dump it in my alt's bank if it's any other profession item.
I've saved so much time in the game by not playing the AH of every item I've earned. Sure, I've only earned maybe 2-3mil in total in the game, I could've earned twice that if I sold transmog greens, gems, all the thousands of Golden Lotuses I've gotten, but why bother if it saves you time not to?