Nikkor AIS 20mm f2.8

Whats this baby worth? (Nikkor AIS 20mm f2.8 )
Absolute minty condition, considering letting it go for a pair of PW's +.
Should I hold out until nikon go FF and then these lenses will become more valuable? (
)
Jonathan
Absolute minty condition, considering letting it go for a pair of PW's +.
Should I hold out until nikon go FF and then these lenses will become more valuable? (

Jonathan