I tried a gogi "meat" buffet about a week ago in my neighborhood. For only 9,900 won (about $9.50) you can get all-you-can-eat Korean-style meat.
There are three big buffet tables. The first table is full of various raw meat that you bring to your table and cook right at the table. We ate mostly pork and beef but they also had some chicken and squid.
The next table is full of Korean sides like: rice, red pepper paste, sprouts, kimchi, lettuce, etc.
The last table was full of other sides like: french fries, egg rolls, fried dumplings, kimbap, etc...
Cooking various meats with various marinades.
The buffet was more of a hole-in-the-wall type restaurant full of college students. It was good and definatly worth my 만 원 - M-ah-n won - 10,000 won.