Discounted ceramic tile are available at Lowes or Home Depot. Sometimes stores have a specific section where they keep tiles that have been drastically reduce in price. Habitat For Humanity stores also carry discounted building goods and sometimes have tiles available.
Craigslist.org sometimes has ads from those that want to sell tiles left over from construction projects. Specialty tile stores in an area may have tiles that were ordered by mistake or that a customer did not want. Buyers can look at major home improvement store website and search for tile. A customer can pay for discounted tile online and pick it up at the store.