All manufacturers experience a price drop on the used market. Some Stern games have dropped more than that on the used market.
Quoted from delt31:Why is that though? Compared to sterns, the drop rate I don’t believe is nearly as fast. Yes they have some LE sales clunkers that dropped quick (Monsters, BK, Sth) but typically those games don’t see they same type of drop that quickly.
A few years ago, NIB/HUO games appreciated, partly because there were a limited number of new games available. Now, there is an abundance of new games coming out throughout the year. People tend to cycle through them a lot faster these days, so there really isn't a shortage of either NIB or HUO games available. For prices to go up, availability needs to be low, and demand needs to be high. For most newer games, availability is high, and demand is moderate.
The only exceptions right now that I can think of are TBL and Aliens, mainly because availability is limited and they are desirable.