Very self explanitory
Here are the examples:
Exchange: Game for Game, permanent trade off.
Sales: A list of games you would be willing to let of your hands for a price.
Purchases: List of games you want to add to your collection.
Borrow: Limited pre-agreed time limit lending of a game.
Trade: limited pre-agreed time limit exchange.
Formats:
Exchange
-Game up for exchange- List the system it's on.
-Possible games/genres you'd exchange for-
Sales
-List of games you have for sale- Make sure to list which systems they're on, possibly with a short overview of them. I would encourage setting prices here also.
Purchases
-List of games you want to buy- Again, make sure you list the systems you want the games on. It might also be a good idea to put a price cap here of how much you're willing to pay.
Borrow
-List of games you have-
-List of games you want-
Make sure you agree on a time limit, even if it's as vague as 'when you beat the game.' This is just for one person lending someone else a game.
Trade
-List of games you have-
-List of games you want-
Again, agree on a time limit. This is for two people lending each other games, basically as a kind of insurance.
You can also combine all of the categories by listing them all in the header.
Exchange;Sales; Borrow; Trade
-List of games you have-
-List of games you want-