Generally, you have to sign a contract for the money of a fitness card. If it is stipulated in the contract that you can only use it yourself or transfer it at a transfer fee, you will not be allowed to use this card in all likelihood, resulting in that you can't use it even if you buy it at a very low price, or you have to pay a transfer fee, so the price is not as good as your own new one. The quality of the gym is the hardware condition, sanitation and time. It's better to be chained, so it's not easy to go bankrupt. For many years, the card has been closed for half a year, and it is not good to find a refund.