It's hard to find old pricing info on Warwicks, but I dug up an old thread from 2007 which showed a Stage II selling new (street price) for $4,079. New today, on the street (if you can find them), seems like they go for around $5,600 or somewhere in that ballpark. Over the last 8 years or so, it's fairly close to increasing along with inflation. However, it seems like you see people talking about buying new Warwicks (even Stage I and II's, Thumb NT's, etc.) picking up new ones in the early 00's in the ~$2,000 range. So either there was a big price jump around that time, or they were just finding good deals of either demo models, leftovers, overstock, etc.
I will say that, even though the new costs just keep seeming to jump drastically, a.) there are a lot of new features that have been introduced over the last couple of years that somewhat justify the price increase (especially the flight cases being included now as opposed to the gig bags),and b.) used pricing has stayed somewhat flat over the last decade it seems. It seems like BO models tend to stay int he $900-1,400 range and NT models int he $1,800-2,400 range, depending on the models. But there are also a lot of people out there who price them much higher than the market will support. But notice that the majority of the time, unless it's a particularly rare model, they aren't moving very quickly if at all. They tend to hang around until the price drops or they cut a deal.
