Each collector is assessed a trader grade A - F which reflects their responsiveness to trade offers. All collectors begin with a trader grade of B. Your trader grade will then increase or decrease over time depending on how responsive you are to trade offers.
Collectors receive lower grades for allowing trades to expire after 48 hours without responding either through accepting the trade, declining the trade, or countering the trade. Collectors receive higher grades for offering equitable trades and responding quickly to trade offers. The higher the trader grade, the less likely the collector will allow a trade offer to expire. For example, Happy The Dog has a trader grade of A+ (the best possible) and responds quickly to all trade offers.
Having an A+ grade does not mean a collector is more likely to accept a trade offer, but it does mean they will respond one way or another. In this way, trader grades can be a helpful tool in choosing a reliable trading partner. Trader grades are shown for each collector when you initiate a trade.
Collectors with higher trader grades receive many more trade offers than collectors without. Trade regularly and responsibly to keep your trader grade at an A+ to maximize your trading opportunities!