Agreed. However I just got bitten by that "error on a significant issue" that just happens to be the ONLY reason I purchased the Mini 5 Pro Combo with regular batteries, and also bought a fourth regular battery, that are now of little or no...
When I see that on an advert I go and look for a different seller. Here in the UK there’ll often be a flat administration fee added to any import fees. Look for somewhere that gives you the price delivered.
As for how much you could pay, that...
If you bring up the radar display showing the drone and homepoint in relation to the RC on the RC or phone screen there is an indication of the strongest signal link shown by the drones icon changing color. Strong link is green, weaker link is blue.