I agree with you that if you have a preference ie. hemi,aar,rt or whatever....you need to wait until you find the right car. In my case I am looking to to a restomod and would actually rather not have something on the rare side. I'm not going to chop it up or anything but will have a modern drivetrain, susp. and interior.
About 10 years ago I had the strong desire to own an all orginal #'s matching 68-72 bigblock convert. vette. So, I waited despite the opportunities to purchase some really nice cars on the cheap. After 6mo waiting I found it! I still own that car and because I waited that 6mo's I got what I really wanted and based on its value today I got it cheap.