@devil_vijay...
My question will still be same, how will you prove in court that it is the same pen-camera as supplied by the seller. The seller has given it free so what?, made a lose on the deal so what?, the seller got the item free and is selling it at a cheap price, there is nothing against that, right. Calculation is one thing and proving in the court is another thing.
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Regards.
Raj Electroniks.