So I've been rallying money together to get all the upgrades and whatnot for the new Gunrunning DLC that GTAO dropped the other day. I went to sell a bunch of cars at Los Santos Customs when suddenly I got a _You have reached your maximum limit for selling cars_ or something along those lines displayed to me in a message.
I waited 28 real-life hours before it allowed me to sell only TWO cars at which point I was again given the message about being at maximum. That was at 2250 on Wednesday the 14th.
Rockstar really wants that Shark Card Money!