JohnyP: Looks like a joke to me.
Same price as a gently used f2.8 and same size as some f2.8 zooms in same range. For example Minolta HS G APO f2.8 80-200 is same size and costs less than this f4.
I wish they had something similar to Minolta's famous beercan - 70-210 F4 (Leica design) and price of $150 on used market (which would probably mean $300-600 if it was available new.
Nikon's beercan equivalent is the Nikon 70-210mm F/4 AF (screw drive, c. 1986).