Earlier quoted context omitted.
How do you know that $350 isn't the reasonable price on their side of it? It's likely going to be a niche market even if they give the updates away for free (because people will mostly use maps on other devices).
Well, you can get a base-model tomtom for AU$179 [1] And the customer's alternatives include "just use year-old maps" and "use google maps" so it's not like tomtom have the customer over a barrel here. [1] https://www.amazon.com.au/Updates-Lifetime-Smartphone-Messag...
The device you link wouldn't net updated maps of Australia. Looks like world map devices are closer to $400.