I visited the track for the first time a few weeks back for the vintage car races, and it is a very nice facility! However, anything from the food vendors is $12 and beer is $10 per can.
I was astounded at the prices at COTA.
When F1 ran at Indy (admittedly 7 yrs ago) the prices were similar to the Indy 500.
GA was 25 bucks IIRC.