Holding a garage sale is a nice way to make a little extra money. However, it isn't something you can do every weekend.
There are plenty of other ideas though that you can implement to generate more cash from a side hustle.
Rather than a garage sale, you could flip stuff on Ebay and Craigslist.
If you are creative, consider selling your talents on Fiverr.
Use your knowledge to become a tutor via Zoom or Skype.
You could teach something by creating an online course, writing an e-book or making YouTube tutorial videos.
Here are 50 ideas from Entrepreneur Magazine:
https://www.entrepreneur.com/article/293954
Here are 9 ideas from Millennial Money:
https://millennialmoney.com/best-side-hustles/
And here are 48 more from Side Hustle School: