Here's a neat little page where you can see a timeline of each component that I added and removed from my computers. Hover over each bar in the chart below to see more details.
You can also use the "custom" tab if you want to make one for your own computer! Just hit the "Export file" button to grab an .xlsx (Excel Spreadsheet) file that you can edit!
* Estimated price of all components on that line. Components that are missing or do not have a price information are not counted. You can change which items are counted by using Shift+Click on each bar.
NOTE: Left clicking on the links in the chart above doesn't work for some odd reason I haven't managed to figure out yet. Middle-click and right-click should work fine.