Cost of living in Muscat (Oman) is about the same as in Arezzo (Italy)
This comparison is lacking data. It provides a decent comparison, but it is not yet reliable. It is based on 405 prices entered by 67 different people.
For example, to keep the same standard of living that would require €2,700 in Arezzo you would need to make just about €2,628 (﷼ 1,144) in Muscat.