In the early days of the web, I did this with college textbooks. It was the very first semester that textbook web sites were open for business. IIRC, they adver

In the early days of the web, I did this with college textbooks. It was the very first semester that textbook web sites were open for business. IIRC, they advertised heavily. A zillion college students got on the site all at once to save money and try out this new e-commerce concept, and the site collapsed under the load. I went through the process 3 times and got an error each time. Eventually I gave up and decided I'd have to buy books in person the old-fashioned way. I'm pretty sure I got at least 2 sets of books delivered to me. I had to arrange for a return, and customer service wasn't happy about it. These days, it's pretty obvious that an error on a web page doesn't conclusively mean a purchase didn't go through, but back then I don't think either they or I clearly understood that.