The biggest one remains using the agent's recommended lawyer. The seller is paid on completion, which differs from acting for you. Your own legal adviser represents a fraction of what is at stake and is money well spent.
Putting your name to untranslated contracts ranks close behind. A sworn translation is a small expense compared with the purchase price. Assurances given by the agent mean nothing when the written text differs — the contract is what counts.
Buying off-plan without checking the developer has damaged many budgets. Ahead of a deposit, review what the company has already delivered, the planning approvals, and whether payments are held in escrow. Late deliveries are normal with even the best developers; abandoned sites are less common but much more damaging.
Ignoring the exit is a quieter mistake. Any property will one day be sold, and the next buyer decides what you get back. A buy property in lipari with no local demand takes longer to sell when sentiment turns.
Lastly, plenty of purchasers fail to plan for the ongoing obligations. Annual declarations are often required even when the home sits empty, and friuli-venezia giulia real estate for sale missed deadlines lead to penalties nobody warns you about. Arranging a local tax adviser from the start avoids most of it.