Online market is as competitive as the real one. As long as you put in the specific name of the spare part you need, you’ll get detailed information of the equipment you need. Most of the websites offer detailed catalog of their products to choose from. Not only that, you can also scour the websites for warrantee and other after sales service that they provide.
Payment is usually done in a secured mode and when you’re about to browse to the credit card page you’ll usually get a pop up that says “you’re about to be redirected to a secure website”. Also shipping of the parts is usually free. Doesn’t this make it tempting enough to buy online?