Buying Online.
When buying items online make sure that they have quality and if you want to resell them, that they are in demand. You aren’t going to make much money if you sell a bad product. People want to buy things that last a long time. If you sell good quality things then word of mouth advertising might help you bring more people. If you sell poor quality things then the opposite might happen. Also make sure where you are buying from is a reliable source.
If you are buying on ebay then watch out for scammers. When reselling the item then make sure you sell it at an affordable price but make sure you are gaining some profit. If you aren’t gaining any profit then why are you doing this?
It’s a good idea not to put all your life savings into one product until you know it works. Otherwise you will have lost a lot of money and have to find a way to earn it all back. Put a small percentage of your cash into something and see if it works. If it does then you can put in some more. If you are gaining enough profit then you can take some of the money for personal use and put the rest of the profit back and make the business bigger so you might have a bigger profit next month.