NB: DO NOT SELL BEFORE YOU HAVE SECURED YOUR RETIREMENT HOME
Remeber, property prices are seldom stable. If you had your present home valued a few years ago, you will probably find that it has increased (or decereased?) in value.DO NOT rely on the municipal valuation or on neighbours or friends to "help" in valuing your home and securing a buyer, for they may have ulterior motives. The estate agent with the most "SOLD" boards in your area is the person you want to deal with.
A word of caution - it is unwise to spend all the money from the sale of your old property on your retirement home. Rather spend less and downsize. Invest the excess cash for your future financial security.