Excise tax based on MSRP or Monroney Label if you're organized enough to keep track of it.
Sliding scale slides down to the 5 year mark then stops sliding, at .004. So a $20k car costs $80/yr in excise tax which goes to the town.
IDK about you but a 5 year old car is yuppie territory and they pay the same as 20 year old beaters.
$35 base registration fee for passenger cars or 6k lb commercial. $20 for antique plates.
$12.50 state inspection/ $18.50 for Emissions. All but a buck goes to the mechanic. They lose money on each one, I'm sure.
$3 "agent fee" to renew at town hall vs DMV.
$33 titles for vehicles newer than 1994. 5.5% sales tax.
My 1983 Mercedes diesel had an MSRP of $32k or so and the fees broke down to over $100 for excise tax, barely tempering the $15 savings for running antique plates. They exempt inspections for antiques but limit driving to 3k miles per year, self-reported to the DMV. If I wanted a run-around car, something like an antique 1975 AMC Gremlin with a $2200 MSRP, no title, no inspection would be about as cheap as it got.