The best time to buy cards is the offseason of that sport, but during the playoffs, people can make quick profits by targeting the right player at the right time. Here are some players that you may want to consider buying and selling while the second round of the playoffs continues. When card values go up , it's a good time to negotiate with dealers. If they have held the card, they will take a profit even if they are not selling at the highest comp. Jalen Brunson, New York Knicks - BUY PSA Jalen Brunson is the heart and soul of the New York Knicks , and the value of Knicks cards usually goes up when the Knicks do well. The Knicks are the favorites to move on to the next round and beat the 76ers. Even if Mike from Sports Cards Nonsense disagrees. The last time the Knicks won a Finals was in 1973. If the Knicks were to win this year, which they have a legitimate chance of doing, Brunson would be the main reason. It could be a legacy-making run for him, and his market could soar.…