It all depends on the 'market', if there's a huge demand for the lipstick initially then the prices are usually semi-reasonable for pre-sales, reasonable to outrageous when it launches and then the increase or decrease depends on the demand/if the lipstick is still available. For 'collectibles' like Riri or Sharon/Kelly I assume they'd stay high since they probably expect someone to always be willing to put down outrageous money. For a no-name non-major collection I assume the prices would eventually go down once they feel like they need to offer some discount to entice someone to get it. Ex: you can get the Lorde lipstick for as low as .99 + shipping on eBay with most other bids ranging around 10 bucks.