Most collectable of the late models is GTF followed by R spec
Then you have the limited run B series. GT40th and cobra.
Then you have the more desirable such as the FPV supercharged cars. Good examples well kept and low Klm.
Sprint cars are nice but reality is that they aren't an FPV no matter how hard you try and squint your eyes....
I'd pick up a cheap one for an awesome daily drive to avoid putting too many Kay's on the FPV.