Prices have dropped quite considerably recently. You can now pick up an e-bike as cheaply as €500. Once you get out of the "budget" range I'd expect to be paying more like €1500 for an average one.
Where can i pick up these €500 ebikes? I've never seen one under €900 and that is with absolute garbage parts. Once you have some decent parts on there they are quickly 2000+.
All the reasonably good ebikes I've checked recently are now several hundred dollars more expensive than a year ago. You can watch a year-old review on Youtube which mentions prices, then go to the company's website to see how the prices have increased.