You can easily sell your unused items to them through Craigslist, eBay, or one of the many other platforms.
If you take paid online surveys on various sites, you can earn a good amount of money in a day.
You can offer services like being an editor, a social media manager, mail management, an online marketer, and more.
In big US cities, the pay for a babysitting job is anywhere from $15 to $25 per hour per kid.
The best part is that you can sell these books online at your desired price, which should be less than the print price.