You are offering $3.00 USPS First Class International shipping. That leaves you wide open to scam artist and rip-offs. I would suggest a calculated shipping fee for international shipments using USPS Priority Mail International. If you can not provide on-line tracking, you will lose every case brought against you, no matter what.
Also, you might want to consider creating a Store Policy page. I know you have most of that covered in your About Me page, but I think more buyers are likely to click a Store Policy page than an About Me page.
You might want to try the inserts found on the item description section of both the SYI form and Turbo Lister. They are pre-linked and will lead customers to your store, other items, and to sign up for your newsletter. With those right in the description, the buyer won't have to scroll up or down to get to a link, increasing the chances they will in fact visit other pages.
---Frank