I've seen serial to USB converters for $12-$13.
If you omit everything but the electronics, that's probably 1/2 the cost.
They could have added that for minimal and I think most people would pay the few extra dollars to not have to use both a serial and USB port.
Most people would kill for a second serial port and they could have made it better.
I myself would like to find something complete like that with maybe 4 lines of text, but I haven't seen anything as nice and refined as that one.
Just my thought anyway...
-Mario