Products like alert devices, vibrator clocks, TTYs, amplified phones, door sensors, smoke detectors, vibrating watches, baby alert, etc. -- where do you buy them online?
If I need clock alarm, flash lighting, etc. then apply Public Health Insurance for their approval before go to "EAR" shop. (HA, clock alarm, etc.... shop).
My favorite shopping at Harris Communications, I rather use ride on the paratransit service to get there because of no bus line in the area (which is 1 1/2 mile from the SWMT bus station).
Why do you need to know about deaf customers directly purchasing from their perfernce vendor? Is that a good reason why you want to increase the vendor's adveresting fee?