It varies, but the models with the column wheel chrono movement tend to be a bit pricey, and the monopusher / column wheel combo the priciest of all.
Retail on this one mine is US$ 3,200. I was offered 25% off locally from an AD on the black dial version - so the price is already significantly less scary. And I was fortunate to find this pristine example for sale by a fellow collector, so I did even better on the exact model I wanted.
Outside of the chronos, the other Heritage models don't seem to carry a huge premium. But they do represent the top of the price scale for Longines, no question. I'm attending a Longines event later this month and hope to check out the new Heritage 1935 in person.