I share in your frustration.
Based on the initial excitement on here, I would have thought that this would have been a popular product.
In the time I've had the P25RX, it's easily exceeded my expectations. I've mentioned your product to several friends but mentioning doesn't always equal sales.
I don't know if you have done the rounds yet but I'd blast every place that will let you post an ad/thread.
The different forums on here, the various radio related Reddit's, QRZ if you're a Ham, etc.
What about contacting one of the writers for the Spectrum Monitor? A couple of them are on here. Not a giant magazine by any means but it has decent numbers from what I've heard and I enjoy reading it every month. Maybe an ad?
I can't believe that there hasn't been a larger response from the people on here that stream their local comms. The P25RX seems like it would be perfect for this application. Much more reliable than a SDR-RTL and much cheaper than using a newer scanner like a TRX or SDS.
Your product deserves to succeed. The support you have provided is far above anything I would have seen from Uniden or Whistler. I feel pretty good in saying that everyone in this thread is pulling for you.
I don't know how I can help but if you think of something, let me know. I am still down for at least another unit, just holding out to the end of the week to see what's left in the "kitty" after all of the monthly bills have been taken care of.