The world’s most expensive substances command their prices for very different reasons. Some, like rare gemstones, are ...

While that torn-up avocado green sofa in your basement might not be worth a fortune, there are plenty of things from the 70s that have surprising value. From iconic toys to kitchen gadgets, keep an ...

Have you ever rummaged through your grandparents' attic or your parents' basement and come across a treasure trove of old ...