Best of luck to you. These are nice chips. A lot of folks went with some of the colors you are pursuing. A ton of horse trading happened after the initial group buys to secure colors and what not. After people had their ideal sets locked up, then tend to hold on until they sell their sets. Selling the sets is unlikely because the value of nice plastics is still around or slightly below original cost. So now, sets come up periodically but you don’t see rack and barrel quantities as often.
Back in the day I had to buy a few sets to secure the colors I wanted, then slowly sell off extras. It’s sort of part of the hobby fwiw.