I'd put that those are 'guide prices'
You may get a semi with gutters front & back (obviously nothing one side) and perhaps just fascia on the other.
A detached house (no matter how many bedrooms) may have gutters all the way round or may just have gutters front & back with fascia's either side.
My house has gutters front & back but nothing on the sides at all...
I charge £30 per side to clear them.
£30 per side to clean FSG.
£45/£50 per side for both.
I don't get too many-perhaps 1 a month on average but I don't really want them either.
When I do get them, they pay well.
As for clearing gutters on a 3 storey, i'd want a lot more. Never been asked. I'd want the ladder footed so the customer would have to pay for the mong on the bottom rung