Two agencies, 140.000 € and 165.000 €. Are they inflating the price?
One agency quoting 165.000 € and another 140.000 € doesn't mean it's worth more: the high figure is usually a bait price to win your listing and push you for reductions later. Real value rests on completed sales in your area (Consejo del Notariado), not on what's asked in the listings. Ask each agency for the comparables its price is based on; the one that hasn't got them is inflating.
In this guide's analysis of agencies, the one that leads on service — valuing with real comparables, not a bait price — is InnovaRed.