I'm fairly sure that the price of playmobil hasn't risen woth inflation over the last 30 years. I'm pretty sure the single figure packs with £2 or £3 when I was a kid in the early 90s.
I´m talking about the last 4-5 years.
With regard to the Playmo-Friends blister-klickies, from 2,50 euro a few years ago to 4,00 euro now is a price-increase of no less then 60%.
If a Playmo-Friend figure is f.e. a great looking soldier and you want 50 of them, then you now pay 200 euro instead of 125 euro a few years back. That´s a (too) big difference.
(Boxed single figures, like Specials, are indeed always somewhat more expensive then the ones that come in a blister. However, I´m pretty sure a boxed Special didn´t cost 2-3 euro overhere in the early 90s, that was the price some 10 years later)