The market works in funny ways for these models, In 1995 when the TR13D De Luxe Red Taxi Sydney was released the production run was 3500
Also in 1995 the TR13C the Silvertop Taxi Melbourne was released also with a production run of 3500.
1996 brought the TR13E Yellow Cabs Adelaide TR13F Blue & White Cab CO. TR13G Swan Taxis Perth and TR13H City Cabs Hobart
which all had production runs of 5000
One model should not be any rarer than another but the demand for certain models pushes up the price. All in all if you really want a particular
model you have to be prepared to pay whatever the seller wants for it,so what it is worth is what you have to pay for it.
Just some of my thoughts
I do have all of the TR40 series FE for which has lower production numbers and to me are priceless
Cheers Stewy