These are mostly those items that cost us more each time we need to replace them, and those that are always in demand, which proves beyond doubt that their price is on the increase.
Buying for investment, means buying at the right price and at the right time, and then selling at the right time to get the right price! It does not mean buying worthless soap stars, or over hyped items just because they look nice, or because it is highly priced! You should always buy names that are known the world over, people that have achieved something significant, and in the best condition that you can afford. If they mean something to you and the item will also give you pleasure, then that is a bonus.