If a seller takes payment and stops responding, options are genuinely limited — this is precisely why the checks covered in how to avoid scams matter so much before paying, not after.
Depends entirely on the payment method used — this is exactly why checking a seller's track record before paying matters so much (see our red flags guide).
Open the vault, pick a listed username, and DM the contact handle shown on the site to arrange payment — there's no cart/checkout, it's a direct conversation with the seller.
Crypto-only. See the Terms of Service for the full payment and delivery policy, including the sale-finality and 72-hour issue window.