Finding treasure at estate sales is getting harder. Like said, most are now run by estate companies.
What I've found is they must watch eBay & CL hard to price items.
I was doing great with old hand cranked meat grinders. $1-$2 at estates. Sell on CL for $25-$30.
With in a month every grinder I saw at estates were suddenly priced at $8-$12.
Which is fine, still room for profit but then the Laws of Craigslist kick in.
You post the same type of item to much, everyone that has that item then posts and dives down price.
So now you can get grinder on CL/etsy for $5 but estates still mark at $10!
Same with old 1930-40s mixers. Use to be $10-ish. Refurbish and sell for $30-$50.
Now estate companies are asking $35-$40!
Still picking but haven't found a "score" in months. Friend did. Paid $20 or stereo. Got $300 for speakers, $125 for tuner and $200 or amp.......threw away tape deck. Literally couldn't give it away. lol