If I remember right they used to be close priced to the 91/30 (I specifically remember the shop had one for $110 when I bought my 91/30 in '07), but the supply dried up for a while. The "new" ones now being sold are from a more recent batch that was found and imported and may be among the last imports that we will get. I read that in a couple places, not sure how true it is. But the prices are higher now. I have seen them in various shapes, but a "field"/"shooter" grade that fires but is questionable cosmetically might go around $100-160 depending on how bad. Normal rifles probably in the $170-220 range. Excellent and/or rare examples on up from there. From this point, they are probably not going to drop in price.
I do not have one myself, but I have seen a few examples and they did in fact shoot to point of aim better with the bayonet out, as least as much as we could tell with the milsurp ammo. They shot similar groups both ways, but with the bayonet folded the zero was different. You could probably adjust this yourself, but it will only be on target one way or the other.
Edit:
IMO, $130 would be a good price unless it is beat up, has a bad condition bore, or mechanical/headspace issues.