I think pretty much everything is cheaper than here except perhaps for transport (train tickets, petrol prices, parking charges are all quite horribly high) if you are earning in QAR tax free and spending there while on holiday. Don't forget to get the VAT back as this will also result in lower prices than what is on the price tag at the store. This will require going in a bit early to the airport for the return journey as the queue for this can get long.