[Endeavor]

I'm interested in this too.

One way you can do is practically the sealed box method.
1. Buy a new TV
2. Buy an old TV (ideally TV with similar dimensions for parts from Fb marketplace/ebay)
3. Put the old TV in the box
4. Return in-store

For US, this method can work really well with Target, Walmart, Costco.

@mothered thoughts/suggestions?

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I do wonder, has someone done an SE for TV with serial numbers?