Reporting sometimes requires that you approach and ask store clerks questions about Firefox OS. What considerations should you make before asking questions?
At times, what I do is go to a store selling Firefox OS devices here in the Philippines and pretend that I do not know anything about it 
asking questions like how is it different from other mobile OS, etc. By doing so, we will know if the store clerk actually know what he/she is selling.
In making a canvas of prices, make them (store clerks) feel that you are a legitimate buyer (just pretend) and not just someone who is making rounds and asking for pricing.
We did the something similar as @bobreyes mentioned.
During the whole FirefoxOS Bus, India journey.
I along with rest of the crew members went to the local stores and asked them if they have Firefox OS Phone and to be honest. They know a lot about it already.
They know, it is only available online, it is cheap and so on.