Thank you for your reply mate.
I believe that your aim is true.
The thing is that I'd feel more peaceful paying about $500 (x0xb0x for $400 + shipping & taxes) if there will be at least small involvement / statement of Technology Transplant. In the end Technology Transplant should receive their money for building the magic boxes. Who knows if some errors will come up - and then, what should buyers do? Google Earth might not be enough...
I think it's kinda reasonable that the payment will be via Technology Transplant's PayPal...
Is there any obligation for the time it will take to build & ship the magic boxes?
And of course a Warranty statement is very welcome as well.
Appreciate your help very much & looking forward your reply!