Opendoor, Sagetech doesn't give prices for the transponders you linked to, one must contact a sales engineer. Does anyone here have any idea of price? I'm guessing it's in the $3,000 to $5,000 range.
I find these transponders very interesting. They're clearly not ready for use just yet, as their certifications are listed as "in-progress". They're also a bit power hungry compared to my Trig. But I'm happy to see that at least one company is working on such items!