These ElectroCookie boards are a little cheaper, at 6 for $10 vs 3 for $8.50 for the Adafruits. The rangemaster I linked to uses one of these EC boards. The main downside is that the EC boards don't have power/ground rails. I will say the Adafruit boards are very well-built and durable, you get a solid product for your money, but they are definitely pricier than your typical circuit board.