I'm about to order some tubes but their site doesn't use a secured (https) connection so I don't want to enter my credit card. Anyone know if these guys are any good? EDIT: I want to update my comment. It looks like they ARE using HTTPS. However, their certificate is "untrusted" (not sure if this is because it's outdated or what) but as you can see in the attached image, Chrome makes it look like it's not HTTPS. But based on the feedback in this thread it sounds like they're a good source so I'll try them.