回复HerbertPreve：For someone learning <a href=https://www.reddit.com/r/AmazonFBAonline/comments/1vrqp2v/how_do_i_start_selling_on_amazon_need/>how to sell on amazon</a>, the safest starting point is a small test, careful documentation, and a realistic estimate of every cost involved. Supplier invoices, product identifiers, safety documents, and brand authorization can matter, so sourcing decisions should be documented from the beginning. Written criteria make products easier to compare consistently.