There are only a small handful of stores that actually stock arrangers of any kind in the U.S., much less top of the line models. Almost all are sold online and that's a shame.
However the customers/users have brought it on themselves.
They go to the store, have the sales person demo it and explain it, then go home and order over the internet to save a few dollars. Local dealers are at a disadvantage because they MUST pay sales tax, and as a result must charge that to the customer.
Even though you are SUPPOSED to pay sales tax on internet purchases, it is common to not pay it.
The one local music store here that used to stock arrangers quit some years ago for this very reason. They would try to match internet prices but this made the profit margin too low, consider they have expense the online stores to do have. They have to pay rent, utilities, salesmen's commissions and/or salaries, insurance and local, state and federal taxes. Losing proposition for them. They can sell ONE piano or Clavinova and make the same profit as selling perhaps 20 or so arrangers.