This is super easy. Load up a six-player local game. Then just start the game. Auction off every property and allow for your piece to get most them, but don't complete any sets.
Choose another piece that will be picking up one property of each color in the auctions.
Once your profile almost has two sets and the other piece has the properties you need to complete two sets, wait for your turn and make the trade.
Just offer 1 monopoly dollar.