Key TakeawaysCostco increased its membership fees earlier this week for the first time in seven years.The warehouse store already had higher fees than competitors BJ's and Sam's Club. The warehouse memberships also include deals on gas and other benefits. Costco (COST) on Wednesday announced its first membership-price increase in seven years. Members are looking at a $5 increase, to$65 annually, for the Gold Star membership and a $10 increase, to$130, for the Executive membership. The increase will take ...