First, a quick question: What should you keep in mind when interacting with a testnet?
A testnet is an independent network that public blockchains use to trial new features. Its rules are similar to those of the mainnet, but its tokens have no real value.
During the testnet phase, data resets and unstable nodes are common. These are normal occurrences.
A legitimate testnet faucet will never ask you to hand over your recovery phrase or private key, or require you to transfer mainnet assets first.
ETH on a testnet is only test currency; it is not the same as the $ETH on the mainnet.

Whether to buy is up to you; this is just a record.