Xbox Giftcard to Microsoft store game trade-in

No. There's no way to trade it for something else.

You can turn that 10 euro Xbox giftcard into about 4-5 euro you will never be able to sell it for straight cash

There are tons of giftcard selling or trading websites you will have to find one based on your region

There is no 1to 1 trades

It's usually the website buys cards at a discount or another user

And the you buy another card if there is one

Selling giftcards never work in your favor

Just use it

And no there is no refunds on giftcard nor will a company ever exchange for a giftcard for another company

Especially with steams rates

you have tried to redeem in console, phone app , web or Microsoft store. the giftcard not have a regional block. if is a game, this is a same region

You can connect a credit or debit account to your Microsoft account and purchase it that way on the Microsoft store on your PC.

I don't have any of those. I can only go to the local retail stores to buy Google Play Giftcards (which is the only Giftcard available here).

no but you can buy Giftcards.

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Money on powerup cards is for trades and certain returns only.