You cannot use a Best Buy gift card to buy another Best Buy or third-party gift card.
Instead of consolidating, you can use multiple gift cards for a single transaction. Best Buy allows: Up to 10 gift cards per transaction. In-Store: Up to 15 gift cards per transaction. consolidate best buy gift cards
Individual gift cards have a maximum value limit of $500 . You cannot use a Best Buy gift card
You can bring your physical or digital gift cards to a Best Buy store. Some store associates or managers may be able to combine several small balances onto one new gift card, though this is often at their discretion and may be limited to whole dollar amounts. In-Store: Up to 15 gift cards per transaction
If you have multiple My Best Buy rewards accounts with separate certificates, you must call 1-888-BEST BUY (1-888-237-8289) to merge them; they cannot be merged online. Best Buy Gift Cards Terms and Conditions