Real Sense (RS) for the everyday flyer in everyday situations is not a necessary feature. If you are flying where you aren't suppose to be flying like
@PatR suggests, yet have to fly anyway because the situation or job demands it, eg. search and rescue in forested areas, flying inside a building for commercial/industrial inspection etc., then RS is invaluable. This last example brings up a feature of RS that no one has brought up yet, IPS mode, or Inside Positioning System that is incorporated inside the RS. If you happen to be anyplace where satellite signals are not available, IPS kicks in and provides very stable (Read: rock solid) positioning, to an altitude of about 40' AGL.
Again, not something that comes up in everyday flying for most people, but the IPS is extremely accurate and stable, much more so than the GPS. The down side of IPS is it is automatically engaged and there is no manual control. RS would be more useful if the operator had control over when to turn it on and off.
A couple more downsides of RS are: 1 When engaged it slows the response and speed of the aircraft, and 2 it also shortens the flight time a little bit.
$200 ~ $250 is a good price for an H480 RS, I have not seen anyone selling Plus RS yet so I have no idea what sellers might be asking, however I cannot see why it would/could/should cost more, other than supply and demand given the abundance of 480 units compared the fewer number of H Plus units.
BTW, I have an H Plus RS unit that is like new, that was taken off mine right after I got it, that I would consider selling for $250 to anyone interested. However do
NOT contact me about it in this thread, you must PM me because this is
NOT a classified thread.
(Mods, if I have stepped over a line here, I will gladly delete the last paragraph).