The thing is it can't be much if anymore expensive than that. As others have said you can build a pizero setup quite cheap. $30 for size and convenience seems about right.
It can be. People who buy this will do so because there is no other solution* available. When there is another solution available, there will most likely be no reason for people to buy this for any price.
As long as there isn't another solution available, the value of this is much more than $30 because of the real purpose of the device (to "save money").
Yes, there will probably be another solution available some time soon (possibly based off of tx's payload), but until that time the value of this will be more than $30.
*solution means "backup loader"
Personally I probably won't be purchasing this for $30 or $80, but that's because I don't mind waiting for an open source solution. For those who are less patient, $80 will seem like a high price but one they will still be willing to pay.