You need to find out rather or not the vendor has pics available of the product they may be selling. When you're shopping in person, you have the option to look at items close up, hold them in your hand, and study their texture. If you are shopping 1080P SD/HD/ 3G SDI 1x8 SDI Splitter 1 in 8 out 300m for SD signals 200m for HD signals and 100m for 3G signals for SDI Cameras online, pics are the closest thing to that particular there is. I would not recommend buying from any web based goods shop that doesn't express pictures of the product. You should research the online goods shop's shipping policy. How much can shipping be? Is it free? If it's free, will it have an eternity to arrive? If I must pay for it, when can I expect my purchase to arrive? These are all traits you as a consumer should know, and you can usually easily find the answers to these questions by simply find a "Shipping Policy" or "FAQ" page on the site. Previous, but certainly not least, you must find out what forms of payment the internet site accepts. This seems like it may be obvious, but I just can't even count the times that I've found a wonderful quality product on a site, only to find away that they don't accept one of the forms of payment I have offered.