It depends on what you consider an alternative. If power, size and GPIO are not considerations, a refurbished Dell Optiplex 790 SFF computer with an i3 and 4GB

It depends on what you consider an alternative. If power, size and GPIO are not considerations, a refurbished Dell Optiplex 790 SFF computer with an i3 and 4GB memory can be had for around $100. Some barebones NUCs with little/no memory also come in under $100. Lower power, smaller size, still no GPIO. If you need the small size and/or GPIO and aren't concerned about GPL violations, a 32 bit Orange Pi with 256MB memory starts at $20 shipped.