I'm excavating and pouring in Alabama at my lakehouse, and concrete has gotten a little pricier... around $120/yd plus labor for starters, and then there are add-ons if you need a pump for delivery ($1,000+ for every visit) and concrete buggies, plus forms for walls, like I do. I will be closer to $500/yd with forming, pouring/pumping, finishing, etc. on over 100 yards in driveways, sidewalks, retaining walls, patio, boat ramp, etc. plus the cost of excavation. My guess is that the 5 yards of concrete includes something that you are not telling us about. If they are just forming and pouring, it sounds very high. If that includes digging, forming, fill, and they need special equipment to get it there, the price definitely gets higher.
Don't fall for that, I know I am in country here in Jefferson, but I just had eight yards, formed lightly graded with shovels and pic for $2500. That is 18 x tapered of 50 ft with turn around for Kubota.