Hello
I m always looking for cheap props! My sister is a yard sale pro. I send her on missions all the time. Also check your local Goodwill store. I have found some cool stuff, like styro tombstones at the Dollar stores. And Big Lots gets alot of cool stuff at the end of summer. Keep an eye out for crosses too.
A friend of mine also finds animal bones in the woods and fields. We have some nice cattle skulls etc.
Happy Haunting!