I just passed on a Prius IV only $395 apart (so close). Not asking what's easier/better to sell, but what is easier to find (inventory/dealer trade) right now: IV plain IV w Nav IV w Solar Thanks...
I saw your other post. I'd have a hard time passing up any deal under MSRP if the car was exactly what I wanted. As far as your question goes, Fitzmall has several listed as on order. Of the IV's only one was "plain" and they had 4 or 5 w/ NAV. That's in Maryland and I'm guessing typical of the distribution of the allocations in that region. When I did the "build your own" a "plain" one is not even an option so I'm not sure how they got that one.
I have seen 7 2010's "in the flesh" so far incl 2 plain IV's, try a Chicago zip code when you build, it's an option...