I don't think prices have gone up in the last 6 months, I think it has more to do with your wants, and our our collective assumption that you want it in "nice" (whatever that means) condition.
I think your specific color requirements are your biggest limiting factor, followed by the fact that you're looking for a car that is essentially loaded with options. You'll find budget flexibility by easing up on your requirements with the understanding that pretty much anything can be added. Also, depending on the condition of the car, you can find more room in your budget. For example, if you'd be ok with a car that was optioned close to what you want but needs paint, you can likely find one in the high teens/low-20's, then paint it the color you want. Obviously, that is not necessarily an easy or cheap thing to do, but you'd have more options.
I'm not an expert, but I play one on the internet.