Thanks to my husbands landlord side job we had bunch of for sale signs and posts. I looked at Home Depot and they were only $15. Add the chalk board spray paint for less than $4, and a chalk marker from the local craft store for less than $5 and you're good to go!
All it takes is a simple spray spray on the signs with chalkboard paint and let it air dry. It doesn't take long! Then a shake shake with your chalk marker and let your creative juices flow!