If you can’t afford it if you like it, there is no need to buy it. You are not collecting shoes. You buy shoes to wear, not to love.
What did you do with the shoes worn by others? If you have athlete's foot or something like that, it will be transmitted to you if you wear it again. It's disturbing to think about buying second-hand items such as clothes, shoes and socks, which are different from electrical appliances.
Remember, if you can’t afford it, don’t buy it. Buy it when you can afford it. Never buy second-hand.