Why am I listing items on Etsy when I have a perfectly lovely web site? Because I have limited numbers of some things, and posting something I only have three of on a web site without an inventory control system results in 100 orders for those three items! Rather than write 97 apology emails, or convert my site to more complicated ordering software, I list those things over here, where Etsy only allows as many orders as I have items.
Immediate payment via PayPal is required for all orders. Items left unpaid at the end of the business day will be relisted. Seriously---don't leave me hanging.