There are three items you should never buy used:
Edmunds.com warns that thin tread isn’t the only safety hazard for tires – old and used tires can pose a safety risk. As tires age, they lose elasticity. As a result, the tread could separate from the tire, causing an accident. Even if the tire isn’t that old, it could have been treated poorly. Bottom line – you can’t tell a tire’s condition from the tread alone, so don’t buy a used one just because it looks good.
Software comes with a product code, and most software manufacturers put a limit on the number of times you can reload it. When you buy software used, you have no way of knowing how many times the product code has been used. For example, if the code has a three-time limit and the original owner used it twice, you’ll only be able to load the software onto one more computer before it’s no longer good.
A used mattress can come with a lot of extras you don’t want – dead skin cells, bacteria, hair, and every other gross thing you could imagine. It might also have bed bugs. The bugs are such a growing problem that Terminix has released a Top 15 Cities for Bed Bug Infestation list.
Bed bugs live off human blood, leave itchy bite marks, and can cause skin infections. And they multiply. According to Orkin:
Females can deposit one to five eggs a day, and may lay 200 to 500 eggs in a lifetime. Under normal room temperatures and with an adequate food supply, they can live over 300 days.
Bring a bed bug-infested mattress into your house, and you’ll pay a hefty fee to an exterminator.