haha in both the first and second case i was one step of doing the exact same things ( different product from china :P ) and i don't know how but i went in my bed with the lights closed and start thinking all the possibilities. When i thought it calmly i realized that it would be a miracle if i ended up earning back just what invested and never took the risk :P
What was your product?
it wasn't just one but i think my finalists were 1) drones ( which after way deeper search were as your gps :P ) and 2) tempered glass for phones but once again because china , they were either smaller or bigger in size that 90% of the phones :P