880lb sounds about 4 lost PAX that could have flown. How much does an average seat bring in per-year on a typical short-haul fleet (with more landings / take offs I think that's the target market) these days?
Well if you look at it that way, a very rough calculation for a loco doing 4 sectors per day, 365 days/year would give you a break even price point of 200k/(365*4*4)=34.25 USD per seat/sector.
Then again are these sort of locos constrained by aircraft MTOW? (Especially when charging for registered and cabin luggage). Guess you would need to consider the incremental fuel burn resulting from the additional induced drag of hauling the 880lb.