How do you get better in basketball? You get better in basketball by playing basketball. Easy. Same goes for sales. Find something on aliexpress/alibaba/ebay/cheap in stores and sell it online or "IRL". Lets say you are found a guy who will sell you 100 comicbooks for 250$. The comic books sold 1 by 1 are worth lets say 1000 (some are worth more, some are worth less). You find a channel where you gonna sell - lets say forums or ebay or whatever. After that you realize. Ok, this was good bcs XY and it was bad bcs XY. Lets try it this way. And repeat. Its all practice and trail and error. Bonus story/advice: I was selling under armor, Nike etc. in my local town. I had a nice 50-100% profit per item and then I made my worst business decision ever. I decided to buy some Guess boots/belts/wallets etc. and wasted around 5k euros on that crap. Till this day I can't sell them all. Advice is -> sell something you know and stick to it. Jason