Or lose value over time as the plastic and metal start to decay. I always find it funny when someone shows up here with a rare item obviously anxious to sell it but asking way above fair market value. When people try to explain the sales history (i.e. use some logic and potentially help the seller price the item), the seller then wants to take their toys and go home. Sellers just need to get a lot more realistic. If you paid a couple thousand for something (which I'm assuming was something in the range of what you paid or maybe a lot less), you're not entitled to a 3X return for holding onto it for a few years. Similarly, not all items double or triple over time. Some just rise slowly as the potential pool of buyers increases or more likely, stay the same therefore keeping prices at about the same level or maybe lower.