Affiliate Disclosure

As an Amazon Associate we earn from qualifying purchases.

This site is a member of the Amazon Associates Programme. That means the links to products here are tracked, and a purchase made through one earns tierbuy.net a commission from Amazon.

The practical effect

• Your price is unchanged. Amazon charges what it would have charged anyway; our share comes from Amazon.
• Rankings are not for sale. Some categories pay more than others. That never moves a product up a page.
• No sponsored entries. No manufacturer has paid to appear here, and none has been offered the chance.
• No personal data reaches us. Amazon tells us how many sales there were, not who made them.

How to tell which links pay us

Assume every link that goes to Amazon is one. They are marked in the page source with rel="nofollow sponsored". Links to manufacturers, to standards bodies and to other pages on this site earn us nothing.

About the prices shown

Each price here is a stored reading, not a live feed. Amazon can change a price or pull a product at any time. Whatever the listing says when you buy is what counts.

What we can and cannot tell you about a product is set out in How We Review. If anything on this page is unclear, ask us.