How this is paid for

00.1Affiliate links

Some outbound links to shops earn a commission if you buy. They are always drawn as a bordered button and labelled with the merchant, never as plain body text, and never disguised as a reference. You pay nothing extra; the merchant pays out of its own margin.

The live eBay listings on model sheets and the parts page come from eBay's own API and link through the eBay Partner Network. As an eBay Partner Network affiliate, 12hundreds earns from qualifying purchases. They sit in their own bordered panel, in the order eBay returns them; nobody pays to appear there, and the site does not rank or price-guide them.

00.2Citations are never monetized

Every factual claim here links to its source, and those source links carry no affiliate code of any kind, including the Reverb and Facebook Marketplace searches used as evidence for used prices. Turning evidence into a revenue stream would give us a reason to shade the evidence, so the two are kept apart.

Nothing on this site is a paid placement. No manufacturer, shop or seller has paid for coverage, position, or a favorable verdict, and the buyer's inspection will tell you to walk away from a deck we would otherwise earn a commission on.

00.3Analytics

The site uses Google Analytics to count visits and see which pages are useful. It records pages viewed and outbound shop clicks. It does not collect anything you type: the identification key, the cartridge calculator and the inspection checklist all run entirely in your browser and send nothing anywhere.