The definition of "used" is approximately "delivered to a customer". Doesn't even matter if they returned the box unopened, and got a refund; you still can't s

The definition of "used" is approximately "delivered to a customer". Doesn't even matter if they returned the box unopened, and got a refund; you still can't sell it as "new". And, no, I'm not speaking of a "warranty." A warranty means "we'll fix it if anything breaks over a certain time period, perhaps with a refurbished part". That's different than "we'll replace this particular part with a new one as soon as we can, even if it's still working, to make sure you get the entire expected MTBF (as that's typically much longer than the overall warranty for the whole device)" It's also wrong to think of used chips being as good as new. Yes, you avoid "infant mortality" (though that seems to be less of an issue than it used to be), but how do you know what environment the washing machine was run in? Thermal and power shocks decrease the lifespan, never mind humidity and static electricity. And even if the environment had been perfect, what about electromigration? That's exactly the reason you can't put used parts into a device sold as new. If you still disagree with this regulation, you're best advised to take it up with the FTC rather than blithely choose to ignore it.