Assuming I had the space to keep them, would buying used cars then selling them at a higher price be a good way to make a few extra bucks. Alternatively I would spend my free cash in the stock market, but instead I could buy an extra car that imo could be sold for higher, then holding onto it until the right buyer comes to the market.

It seems like a fairly easy way to make money. I would just browse used car websites until I find something that's an outstandingly good deal (and these do happen), inspect the car, buy it and put it back on the website but for a grand higher, then wait for a buyer.

I feel like if people are moving or something and don't have the time to fairly price their car due to time restraints can be taken advantage of in that way.

What are your thoughts?