Exchange rates shift minute by minute. This means the price your developer or agent quotes you today may not be the price you eventually have to pay for your home. For example, a €150,000 property on the French Riviera that would have cost £98,250 in June 2004 went up to £101,250 by July 2004, simply because of exchange rate movements.
Buying a property outside of your country takes time. Legal processes and local red tape can slow things down. Your agent may quote a price based on an average or approximate exchange rate. It may only be a rough estimate. Can you afford to proceed with a purchase without knowing the exact cost?