How can I buy v.3.0

I have created a profile but when I go to the Buy section and click to go to the buy version 3.0 the page has no method of actually placing the sale i.e. not quantity amount or buy button. I have tried this on Chrome and IE10 and I cannot see how I can actually buy the software. Please advise how I can but and download Custom Properties - we currently use it on a J 1.5 site that we are upgrading to J 3.1.

I looks like the billing address is missing.

You can complete your profile visiting Member Area > My Profile > Manage your addresses