@Millertime that is kinda what we do. But we are in a parking lot, live to far back in the woods to be at the house.

Haven't had much a theft problem but I don't sell my high value items at a yard sale. Use other venues for that stuff. Our yard sales are strictly that cheap get rid of the stuff, before it hits the trash.
The only problems we will really have is husband handles the man stuff and never puts prices on anything.

So if he takes a break someone might try and take advantage of the situation. But if it is an over $20 item I will know that.