eBay

I have published an offer. But when i press buy it now button. It redirects me to Ebay site. And it says looks like this page is missing. Is ıt possible to buy a listing item on sandbox environment?

I want to place order on Sandbox environment. But https://apix.ebay.com/buy/order/v1/checkout_session/{checkoutSessionId}/place_order requires https://api.ebay.com/oauth/api_scope/buy.order OAuth scope.How to add https://api.ebay.com/oauth/api_scope/...