My wife and I both have Gazelle e-bikes (made in the Netherlands) bought from Cycle Heaven in York. They let us try them out before buying. We had a lot of problems with our first e-bikes (new technology at the time) but both Gazelle and Cycle Heaven sorted everything out very satisfactorily. The current bikes have been reliable and are excellent to ride. I’ve done 2,500 miles on mine with only one problem - a rear wheel puncture. Getting the rear wheel off to replace the inner tube was so difficult I had to take it back to their workshop. It’s worth asking retailers about this because as well as the chain, there are sensors and cables which may need detatching. The bikes are currently advertised at `£2,300 each, which we think is reasonable for bikes which are made to be used every day and in most weathers.
One lady I know bought a e-bike about the same time and in 5 years has done 22,000km on it!
The Gazelle bikes have a choice of battery, giving a choice of range. We bought the ones with the biggest battery, partially because batteries do lose charge as they get older. I often cycle along the seafront and the wind can be so strong that I have to use full boost power plus me pedalling in just 2nd gear, that does eat up battery power quickly, but coming back the wind blows me home.
The bikes are insured, including third party liability, the policy does require the use of a high quality (expensive) lock even when in the garage at home. The insurance has ‘breakdown cover’, but all it is is arrange a taxi for you and your bike yourself and we’ll pay for it.