uhm materical wise i havent added up how much it costs it's also depends if you need paint and such it costs probably 5-10 dollars material wise at least (but you'll spend closer to 20 dollars on supplies if your only making one im sure you'll have left over suplies), they also take like3- 5 hours depending to make and paint. the base is wood, theres grout, clay, beads, card boared, glaze and paint
They're amazing! I think you should sell them! ^_^ as for price i'd say (just from looking at them) $10-15 maybe? But then depends on whether or not you'd like to take in part how long it took you to make, and materials.