You need to find out rather or not the vendor has pictures available of the product they can be selling. When you're shopping face-to-face, you have the option to look at items close up, hold them in your hand, and study their texture. If you are shopping 1.25-inch 2 times multiplier single lens, astronomical telescope accessories online, pictures are the closest thing to that particular there is. I would not advise buying from any on-line goods shop that doesn't exhibit pictures of the product. You need to research the online goods shop's shipping policy. How much definitely will shipping be? Is it no cost? If it's free, will it consider 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 should know, and you can usually easily find the answers to these questions by find a "Shipping Policy" or perhaps "FAQ" page on the site. Previous, but certainly not least, you should find out what forms of payment this website 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 some forms of payment I have readily available.