Excluding food, beer etc...
Marseille cost me £444/each - (3 of us) - Flights to Lyon, TGV to Marseille & 3 bed apartment
Amsterdam has cost £231/each (2 of us) - Flights from LTN to AMS, twin room hotel
Athens is going to cost £366/each (2 of us) - Flights from LGW to ATH, 2 bed apartment