Very hard. I recently had one, yesterday and I made $9 haha
So, I think the problem is the location. The yard, and this bitch ass neighborhood. also yardsales are a lot of fuckin' work with no goddamn reward. I had most my things prcied for a damn $1 and people were trying to jew me down to 50cents I mean WTF?
Of course, I had some of my rocks out there and sold only one for $5. (And I have really good rocks) Some guy thought the magladon fossil sharks tooth was a fucking arrowhead. I guess the buying public IS really that fucking stupid
He was all, "Hey hunny look at this cool arrowhead!" and picked it up to show his fat GF. Of course I was like hello you dumb bitch, that isn't a arrowhead. And he just looked at me and walked off.
In short. I will never have a yardsale again, all that work for nothing. complete waste of fucking time if you ask me