Bitcoin Testnet can be reset and attacked, among other undesirable things, TBTC is an excellent choice for developing, testing, and learning.

Dont bash or ask why... just do it

I will pay Bitcoin if you are selling just post it on

https://altquick.com/exchange/market/BitcoinTestnet

Just contact me when you do on discord

https://discord.gg/5c4SkbRvVT

here are some other links to buy testnet Bitcoin and get free tBTC from faucets.

https://buytestnet.com/

https://testnet-faucet.mempool.co/

https://bitcoinfaucet.uo1.net/

https://coinfaucet.eu/en/btc-testnet/

https://faucet.triangleplatform.com/bitcoin/testnet

https://tbtc.bitaps.com/

https://testnet-faucet.com/