Hey, the Vespa "helmet" you can buy for 1k credits from the market isn't the actual helmet, it's just something that converts the arcane version of the helmet into a non-arcane version. Buying the converter won't get you a helmet unless you already have the arcane version.
You can buy the helmet from the market, but it costs 75 plat, not 1k credits.
A lot of pages on this wikia are locked to new and unregistered users to prevent vandals and inexperienced players from making bad edits. Once you have had a profile for 4 days and have 10 edits on non-locked pages, you will become an auto-confirmed user. Then you will be able to edit most pages.
Please leave me a message if I can help with anything!