I have to agree with "admiralnick," Reply #9, as to Slavic Orthodox parishes. Their priest's salaries are not too generous, though they tend to live in rectories and some of their living expenses are paid for by the parish; sacraments should be considered necessary for their reasonable remuneration.
Greek Orthodox Archdiocese of America parish priests, especially with 200 or more members, are paid by the GOAA Clergy Remuneration scale which is quite generous. Gratuities for sacraments should not be considered too necessary, $60.00 to $75.00 is sufficient; -0- is not too uncommon. I've been a nonsalaried, volunteer chanter for nearly 38 years, and I expect $35.00 to $50.00; the presiding priest sends a letter to that effect (for the chanter) to those who schedule sacraments.
Antiochian and Romanian parish priests are better remunerated than the Slavic parishes, but not as well remunerated as the Greek parishes.
People who are active parishioners, regularly giving, are not expected to come up with significant gratuities for the priests in the good sized GOAA parishes. Those who join the parish to have a wedding or baptism performed, are expected to be more generous with their gratuities, based on my experience. No one is expected to go beyond their means. No gratuities are required if the gratuity would be too financially straining. But, with people spending $15,000.00 for a wedding, $50.00 for the chanter should not be considered too much to ask, in my opinion.