Customers can get cheap concrete blocks if they purchase them through wholesalers, such as Landscape Liquidator. As of 2015, this seller offers two style of concrete blocks: standard gray and rock face. Rock face blocks come in several colors, including brown, burly wood, desert tan and charcoal.
Landscape Liquidator promises that their blocks are twice as strong as big box stores. They also allow customers to pick up their blocks or have them delivered.
Customers can also search for cheap concrete blocks on Build.Recycle.net. This website allows sellers to post their supplies of concrete blocks for interested parties. All blocks sold on this website must be whole, unbroken, used and suitable for construction purposes.