How to buy NFTs without owning crypto

Until recently I was convinced that you can't buy an NFT without crypto, but I recently learned that ofc you can with dollars, credit cards, or through a friend.

One of the simplest methods to get these unique digital assets without having cryptocurrencies is to buy NFTs with a credit card. Some NFT marketplaces, such as OpenSea and Nifty Gateway, let customers use credit cards to purchase nonfungible tokens. It is crucial to remember that not all marketplaces accept credit cards as a form of payment.

Users must register for an account on the marketplace they want to use to purchase NFTs with a credit card. Before customers can use a credit card to purchase nonfungible tokens on some marketplaces, identity verification is required. Users can browse the various NFTs and choose the ones they want to buy after creating and verifying their accounts.

I'm for now interested mostly in ReelStar, I'll need to check my payment options there.

Another way is using a peer-to-peer exchange which allows users to buy and sell NFTs directly with each other without the need for intermediaries such as banks or payment processors.

What I didn't understand is how you use third-party services to buy NFTs. What are the third-party services for NFTs?

But what I heard is that the inability to purchase NFTs without crypto may also be hampered by high transaction costs and security issues.