Haven't used Lynx for a few years. I think I've used w3m through a shell account to buy computer parts online before because it supported SSI.
Edit: Just remembered. I had bought a motherboard from the now defunct bunta.com. They had to call me because they couldn't understand how I managed to use dashes in the credit card box (was new to credit cards at the time). I guess normally the order wouldn't be allowed with those dashes when using IE and such.. hehe..