When Xian asked a friend for advice about purchasing a stationary exercise bike for home use, their friend said, "You should never buy an exercise bike at introduction. Companies always use a skimming pricing tactic to quickly recoup their costs. Instead, go to Play It Again Sports or eBay to look for used bikes. Many times they have barely even been used, but they are a lot less expensive." Xian's friend is advising them to take advantage of which common pricing tactic for used products?

loss leader

penetration

price lining

premium $($prestige$)$

second market discount