That depends on where to eat and what to eat.
And the consumption level in your place.
If the street barbecue stall 150-200 or so.
It's the same price to barbecue yourself, but the food will be better.
Barbecue shops are generally 300-400 in Korea and 400-550 in Brazil.
Self-help 35-70 per person.
The most expensive barbecue restaurant is about 1500, with authentic environment and good service.