How to make a website order when paying by money order or cheque HELP page is here
Scroll down to the bottom of the description and find "Item Quantity" change the item number to the number of items you want (if you want just one leave it as the default "1")
This is because the item is out of stock - there is a notice that says "This item is currently out of stock". Because the House of Oojah has its items in stock - if an item is out of stock we don't allow you to buy it.
You don't have to create an account - you can checkout without an account and just put in delivery details.