@Steve It can be useful to have documentation that provides illustrative links/pages to generic sites like Ebay, AliExpress, BangGood, etc. I know it's not always good to encourage people to buy from certain resellers, but this is helpful. bigclivedotcom, on his YouTube videos, often prints out or displays typical ebay pages that he buys from. Even if the seller no longer sells it, it is very helpful for new people to see the typical prices and pictures.