My experience is very different. I bought a used 2001 Prius with
36,000 miles for under $15,000. That is lway ess than a comparably equipped new car that gets way less gas mileage. Also, I get better gas mileage on the highway than I do in the city. When I fill up and get on the highway and drive I can get up to 53 mpg. When I fill up and do just city driving, the best I can get is 45 mpg. I think it is the fact that the engine starts up a lot more when city driving. I can't seem to just start out with just electric power. I think the new Prius may be better at that.
My used car still has the remainder of the 6 year 100,000 mile warranty. Also, it seems Toyota is trying to please us Prius owners. I have a knock in the electronic sterring rack. Toyota is replacing it for free. The service bulletin stated that they are doing this to keep in good graces with the Prius owner. So, there may be some perks to buying an older Prius. It is a wonderful car and I'm not sure I can ever go back to a non-hybrid.