1 From the secondhand account, the reader gets more background information about what the Oregon Trail was. 2  From the firsthand account, the reader gets a better understanding why it was so dangerous.
Printers generally age more by the number of pages printed rather than by pure years. The rule of thumb has always been whatever the recommended volume is (for instance 5000 pages per month for a P3005) multiplied by say five or six years so about 300,000 pages would be the life expectancy of the printer.
There are four main types of printer: 1) laser. The laser printer is very expensive to buy but cheap-ish to run. The output quality is very high, and it prints very fast. 2) Dot- Matrix. It's very old, very slow, and very noisy. IT also has a poor output quality, however it's cheap to buy and fairly reliable.