This is an way to make money that works , you wont be making that much but it works
For this method u will be selling clothes on ebay / vinted. Not your old clothes new ones i go on reddit and find different sellers that have counter fit items ( don't buy a lv t and try sell it , it just wont work) I find a sellers that sells stussy and brands like that. You can usually get these t shirts for a low price i will link the reddit group i use to find these items https://www.reddit.com/r/FashionReps/ Then when u have found a item you need to use a agent to purchase it , i personally use
https://sugargoo.com/ but there's others. Then after it has arrived at the warehouse ship it out , shipping can be a little pricy depending on time of the year and how much your items weigh. I would recommend buying rep stussy cause there is a market for it. Now you have shipped it out and its at your house take some pics of it and list it. I list the item from 25-50 depending on what type of t-shirt it is some ones go for more money than others. Now you wait for it to sell and you repeat easy as that!
i can make a part 2 step to step on what to do if needed