You need to find out rather or not the vendor has pictures available of the product they are selling. When you're shopping in person, you have the option to look at products close up, hold them in your hand, and study their texture. When you are shopping 10pcs/lot NCE6020AK MOSFET-N 60V 20A TO-252 In Stock online, photographs are the closest thing to that there is. I would not recommend buying from any on the net goods shop that doesn't exhibit pictures of the product. You have to research the online goods shop's shipping policy. How much will certainly shipping be? Is it free of charge? If it's free, will it have an eternity to arrive? If I need to pay for it, when can I anticipate my purchase to arrive? These are all things you as a consumer ought to know, and you can usually easily find the answers to these questions by simply find a "Shipping Policy" or perhaps "FAQ" page on the site. Last, but certainly not least, you need to find out what forms of payment the site accepts. This seems like it will be obvious, but I can't even count the times that I've found a wonderful quality merchandise on a site, only to find away that they don't accept many of the forms of payment I have offered.