From Ian Page:
Mactracker provides detailed information on every Apple Macintosh computer ever made, including items such as processor speed, memory, optical drives, graphic cards, supported Mac OS versions, and expansion options. Also included is information on Apple mice, keyboards, displays, printers, scanners, digital cameras, iPod, Apple TV, iPhone, Wi-Fi Cards and Base Stations, Newton, and Mac OS versions.
What's new in this version:
Version 7.5 adds the latest Apple hardware and software along with support for OS X El Capitan. This release also adds the ability to estimate the current price of certain models in euros, pounds sterling, or United States dollars.