Still $2.399 at Costco here. Prices have been pretty stable.
What isn't stable is the credit card surcharge. A Union 76 mini-mart I pass regularly (and always) is charging a 17 cent/gallon premium for using a credit card. A few stations no longer accept cash.
Almost all Oregon gas stations are mini-serve. Self-service is available only for diesel, motorcycles and gas in a few outlying areas.