For my daily beater, an old Corolla, I fill it up with 87 which is currently at $2.27 at Valero in my area.
For my 2019 Camaro SS, I fill it up with either 95 (theres only ONE gas station in the entire county that offers anything higher than 93 at the pump) - last I filled with it was over a month ago and I think it was around $2.90. Its a bit out of the way, so I only tend to fill it with 95 when I am in that part of town. Other than that I either use 93 or e85, which are sitting at $2.50 and $1.80-ish respectively.
Although, with e85 the fuel economy just tanks. What I could get about 400miles per tank on gasoline, ethanol halves that. But the fact that its effective octane rating is 105, I'm ok with that. Gonna be great next year when I finally get to make it faster than it already is.