Earlier quoted context omitted.
Nice looking board, but I agree, you should charge more. One market to consider is automotive scopes- since it already can interface with a phone, putting different connectors on there and with a case would suffice for most uses. Compare to a Pico scope for the market leader in this segment. It definitely doesn't need to be a 100% finished consumer product (that's already covered), you wouldn't be selling to hackers…
Honestly, I designed it when I was a student because there was nothing usable at the low-end of the market. While I could possibly charge a little bit more for it, I don't think the specs justify a $50+ price point (as-is), and for a lot of people that extra $20 makes a big difference. There were some thoughts a while back of making a higher-end product to fill the $50-$80 gap, and possibly even a stripped down Labra…
Edit: I still bought one as is, lol.