@cedarlakeinstruments yeah you are right but
1.The devices available in current scenario are expensive Vboxes for gps speed tracking that are very accurate, and they are only used for motorsport data logging. My application does not require that much accuracy and precision, so I can make do with a basic GPS adapter without any other components.
2. The other function that my device performs is reading and displaying OBD values. There are many chinese devices that do the same thing and are priced at double my price but any branded device sells for a lot of $$$. I do not know why they are so expensive when chinese clones are available for way lesser prices.
Chinese devices sell for about $200
A branded OBD module and display costs about $800-$900
A good VBOX costs about $1500 here.
And my device costed about $50 without a case and is performing well for the last week or so. To buy an equivalent system from the market it will cost me about $800 for the VBOX and another $800 for OBD system. So I have a fair margin to price it affordably and still cut out a neat slice of profit.