Where do you think all that stuff in the store came from? stole it from somewhere else?
Yes they do trade ins. https://tradein.bestbuy.com/client/#/catalog
Yes, under certain circumstances. For example, if you're looking to purchase a new printer, oftentimes there will be trade-in special if you have an older printer.
Yes, they to trade old gadgets, even one can check the approx trade in price online
No
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