Bidding up your own inventory, about 40 years ago several equipment dealers
worked a scheme in the South to buy each others inventory, "A" would buy a bulldozer from "B" and pay $20,000 too much, then "B" would pay "C" $20,000 too much for a like type piece, then "C" would buy from "A". They all were whole because they just swapped over-payments. They just got an increase in their floor plans from the bank based on inventory. As I heard it no one set out planning to defraud anyone, they planned to pay the banks back when they liquidated the pieces in maybe 9 months. It was just short term cash flow until it got away from them, the business is cyclical and the extra equipment they bought with the added money also lost value.
There are now millions of players and 100s of thousands of chairs, low volume exits are manageable ask Bernie Madoff about that one. Should the music stop abruptly the game falls apart as they stampede for far too few chairs to accommodate half.