If you’ve got a website or a list (or, ideally, both) then chances are that you’ll need products to promote to it. After all, earning even a bit of pocket money from those promotions could turn your hobby from something that costs money to something that earns money. Or it might even take over as your full-time income source.
The best way is to sell products for commission – a bit like normal retailers do, except you’re not investing in stock.