I suspect there are folk who had ebikes on cycle to work schemes that can sell them on and almost cover their outlay, and get a brand new bike on the next C2W scheme. That’s the case with my haibike which has a secondhand value more than it’s actually cost me to buy it. I don’t think this is any different to regular bicycles in that regard but as the market for ebikes is relatively young it’s perhaps more noticeable.