What is a niche hobby of yours that you are fascinated by and would like to share with others?
I'll start. I have recently gotten into 3D printing, and, while incredibly frustrating sometimes, there's nothing more rewarding than getting a perfect print.
DVDs are always welcome. We have like 900 discs right now. $1.50-$3 a piece over several years.
Then it’s all kitchen gadgets. All kinds of single purpose appliances for <$10. If they work out, keep them or upgrade them to a higher quality brand. If they don’t, donate them back.
It’s a lot of fun, and a real shopping experience that forces you to consider different options because if limitations where Amazon might funnel you into a single solution.
We only really shop Goodwill and are familiar with the layout and trends. It has gotten worse lately, but we did get a working, clean minifridge for $50 ($250 new), and we got our stand mixer from the auction site mentioned by someone else. $90 for the mixer and a ton of attachments. Just needed a $10 gear replaced.