The ridiculous prices the military ones have been selling for seem to have driven the prices up... :D
However 4BD1 powered landies have consistently been selling for more than early tdis for a few years now as they are more desirable.
The lowest I have seen them sell for is ~$2500 (one with a cooked motor and one a very early mil prototype full of rust). Others around 5-6k but they have all needed a lot of tidy-up work.

