How to trade in Monopoly, and win the trade

Trades decide the game

Almost nobody completes a set by landing on every square of it. Sets come from trades, so the trades are where most games are won and lost. The dice decide which properties come up; the deals decide who builds on them.

Value by sets, not by printed price

A property's printed price is the least important thing about it in a trade. What matters is what it completes: the last square of a set unlocks building and multiplies rent, so it is worth far more to the player who needs it than to anyone else. Before any deal, ask what each side can build immediately afterwards, and what cash they will have left to build with.

What a good offer looks like

• Give each side a set, but make sure yours is the one you can afford to build on first.
• Ask for cash alongside the property when you are giving up a set-completing square.
• Offer to the player who most needs what you have, not the one who has what you want.
• Trade early, while everyone still has the cash to build. A set you cannot afford houses for is a set in name only.

The trades that lose you the game

• Giving someone the last square of a set for a property that completes nothing for you.
• Taking a set but spending all your cash to get it, then having nothing to build with.
• Completing a rival's set on the expensive side of the board in exchange for a cheap set you cannot develop as fast.

Trading in Kiraya

Trading is the centre of Kiraya. Any player can offer any other a mix of cash and deeds from both sides; the other player can accept, decline, or counter with different terms, back and forth. Nothing moves until somebody accepts, and the server checks both sides can still afford it at that moment. Bots answer trades too, and the Expert bot refuses any deal that hands you the last deed in your set.