Short answer: Check Facebook Marketplace's Free category, Craigslist free, Buy Nothing groups and curb alerts. Penny Saver watches listings within your radius and ranks them by likely resale value.
Penny Saver: Find free & below-market deals near you — keep them or flip them. Try it 14 days for $1, then $19/month.
Earnings disclaimer: Penny Saver shows potential resale values based on past sold prices. Results vary, many users earn little or nothing, and no income is guaranteed. Not affiliated with Facebook or eBay.