No contestant has ever landed all five chips in the center chamber, which has the highest dollar value [3] To date, the largest amount of money ever won at Plinko isR$39,200 [4] To maintain consistency, there are only ten Plinko chips, and they are locked up after each use [2]

Plinko remains the only game in Price is Right history to have never been officially won; a "win" technically means winning the highest announced prize.

You can win real money in cash games and tournaments\n\n Although many people play poker for the joy of doing so, even more play real money poker at PokerStars to win more money!

To answer briefly, no, you can't legally sell play money on PokerStars.