Making 2 products causes inventory issues and makes both more expensive.
After we launched the ThumbDV we still get a couple of requests per year for the PiDV but the economics don’t work out.
We spent a lot of time deciding on the GPS. With the UDRC one could add a USB GPS but that wouldn’t give you PPS, which is arguably not a necessity for Ham Radio but is pretty cool. DRAWS is also a 4 layer Board with additional features; ADC, serial port, and Expansion connector, which increases Ir’s cost.
We even did a survey and found that a majority of responders preferred the on board GPS.
By Comparison the popular Signal Link USB with Cable is $129.95 and has only 1 Radio Port and no GPS.
The best way to save Money is to do a group buy:
5% for 5 units 10% for 10. You can mix DRAWs and ThumbDV in the order.