The biggest one is relying on the seller's lawyer. The seller gets a commission only if the sale goes through, which differs from acting for you. Separate legal representation costs a fraction of what is at stake and is money well spent.
Signing documents you cannot read ranks close behind. A sworn translation is inexpensive next to the purchase price. Assurances given by the agent will not help if the written contract says otherwise — only the signed text matters.
Buying off-plan without checking the developer has ruined a great many buyers. Before any payment, examine what the company has already delivered, the construction licences, and the guarantees on staged payments. Late deliveries are common with even the best developers; abandoned sites are rarer but genuinely ruinous.
Forgetting about resale is less obvious but just as costly. Any buy property in turkey alanya has to be sold or passed on at some point, and the resale market determines the price. A property with no local demand sells slowly when sentiment turns.
Lastly, many buyers fail to plan for the ongoing obligations. Local tax returns may be required regardless of whether the buy property in indonesia earns anything, and late filings lead to charges nobody warns you about. Arranging a local tax adviser from the first year prevents the majority of these headaches.