Some sellers offer "partial private keys" from old wallets. Without the full 52-character WIF (Wallet Import Format) key, the wallet is useless. An exclusive wallet is only worth something if the full key can be extracted.
To help me give you the most accurate and actionable advice, let me know a bit more about your situation: old walletdat exclusive
Wallets that have not seen a transaction in over a decade. Some sellers offer "partial private keys" from old wallets
Bitcoin Core development is gradually . The reasons include: old walletdat exclusive
The wallet.dat file is a Berkeley DB database file used by Bitcoin Core (formerly Bitcoin-Qt) and many other early altcoins. It acts as a container for all the private keys necessary to spend the Bitcoin associated with your public addresses.