The costliest error is relying on the seller's lawyer. The agent is paid on completion, which differs from acting for you. An independent lawyer represents a small fraction of the purchase and is money well spent.
Signing documents you cannot read ranks close behind. A certified translation is inexpensive set against the sum being committed. Assurances given by the agent will not help once a dispute starts — only the signed text matters.
Buying off-plan without checking the developer has ruined a great many buyers. Ahead of a deposit, look at what the company has already delivered, the building permits, and valencia real estate how deposits are protected. Projects running behind schedule are normal even with reputable builders; stalled projects are rarer but much more damaging.
Ignoring the exit is a subtler error. A home bought abroad will eventually be sold, and the pool of future buyers determines the price. A unit that only appeals to foreign buyers is harder to move when conditions change.
Last of all, buy property in malaga a lot of buyers misjudge the ongoing obligations. Annual declarations are often required even when the home sits empty, and late filings lead to fines that grow over time. Setting up a local accountant at the outset prevents most of it.