white shirt and black pants. no need for a tie but it's always better. They want a team player who can listen to the customers and think on its feet to find the best games for them. Must have good communication skills and be somewhat decent at negotiation when it's time to buy a second-hand game. If you're a normal person, they should hire you at least for a trial period. If you're a nerd and really introvert then prepare the interview thoroughly and tell the truth.