My camera didn't cme with a tag. All new ones does as per the convention. Dealer says its brand new. It looks though. Also, all the other accessories are well packed like new except for this and the battery which had heavy dust on it.
Moreover, when I hold the camera or when moving around, i feel something inside the grip or near the lens moving/rattling a bit. Sense like some part is losely fitted in and is shaking in. Do you see these anywhere?
Where's my serial number?
The serial number of a product is usually a 7 digit number printed on a label on its back; though it can sometimes be tucked away somewhere, such as in a battery compartment. You may find it beneath a barcode, sometimes as an isolated seven digits of a longer sequence of numbers.
Alternatively, you'll also find it printed on the carton the product came in.
Occasionally, a serial number will only contains 6 digits. If this is the case, please add a "0" at the beginning when registering it (so 562220 should be registered as 0562220).
Where's my Product number?
The method for locating your model number depends on when the product was released.
For models released before Summer 2000
The computer information and compliance label (located on the bottom of the notebook case or the back of the desktop case) indicates the actual model / product name.
For models released Fall 2000 and later
The model name can be found on a small label located in one of the following places:
On the bezel (frame) of the LCD display.
On the LCD hinge.
At the top left or top right of the keyboard.
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I am sure your product comes with 7-day (or something like that) return guarantee. If you can't find the product S.no. your product may not have manufacturer (Sony) warranty.
Fix the issue as quick as possible with the seller. I don't have any experience in buying online. Returning the product and getting the money refunded or product replaced, I don't know how difficult/easy the process will be.
You have spent around 20k, you should be satisfied with product you bought. If not, better return the product.
I am thinking of buying one for myself, but this kinda things concerns me when buying online.