I no longer get collectors plates, in that you lay out (say) ~$280 up front, and if you transfer the plates to another eligible collector car, they 'pro-rate' the plate value severely.
So, I lost most of the 5 years of registration value when I swapped after 2 years. I'll go year-to-year and avoid this Colorado TAX on collector cars. I'd only keep the plates going on a truck you are sure you will keep for at least another 5 years.
Colo Springs, CO