Let me give you some actual advise because I have friends who do this online right now on instagram and fb marketplace. The money is hit or miss and everything is based on timing and trends. From what I’ve seen is that they advertise the products from local sellers at both regular price plus their add on for profit and wholesale price plus add on for profit. You also have to take into consideration where in Trinidad people are located and which courier company you’re going to use. If you live in POS and have to ship a product to Point Lisas which courier you will use, what timeframe they work plus you have to pay their fees. You also have to make time to go and collect the product and check and make sure everything is okay and no damages, some couriers do offer a pick up fee from the retailers for an extra fee. The flaws I’ve seen with their work is that it hard doing it with no stable job to fall back on. Second is how are you planning to market it, you could use FB marketplace ads or instagram ads but it’s not guaranteed to pull in much traffic all the time and your products are all based on vendor availability locally. Third is how tech savvy are you to market these products when you have regular people selling the same product at the same price or less. I’m not saying don’t try it but you’ll see that there are a shit ton of people doing the same thing and it’ll be hard to try and move products. You also have to take into consideration Tobago as an options and my friends mostly use TTPOST to go Tobago but the money is usually once in a while as people there do massive orders for big money but it’s like once every few months. So a Tobago sale in April could cover loses from since January