5% (+VAT) is the going rate; this seems high compared with the UK but the Market is very different. Most UK EA make their money from on- selling 'products' : mortgages, life insurance etc. EA in Cyprus do not do this. Also, it is a matter of volume, a UK EA will sell many times more properties each week that a Cypriot EA.
Also, achieving a low commission rate is not always a smart idea: the company and sales people are rewarded on how much commission they sell a property for. So, let us say a buyer comes in and the EA can show them your property (on which he will earn 2%) or five others on which he will earn 5%. The buyer will never even hear about your property. It will never get sold.
Also, be warned, if you use an unlicensed EA you cannot set their commission against any Capital Gains Tax liability - alos of course they will not have professional indemnity insurance etc.
Lana