The reason why in my opinion many bike shops shy away from selling E-Bikes are the following first being is theses things are not for your average person.
E-Bikes need more maintenance then a regular bike, especially spokes also they get more flats then regular bikes & they are harder to fix the flats . I think that in order to own any brand e-bike you need to be a pretty good mechanic, also have had a lot of experience riding bicycles for many miles or better yet have cut your teeth on motorbikes for years.
Even though the gearless hub motors are whisper quiet & smooth the controllers are more complicated & they do fail I dont care what brand bike.
There's other issues that come when you electrify a bicycle it's harder on the components, brakes wear out faster, seat rails flatten easier, kick stands break easier, rims bend easier, tires wear faster.. Then there's the batteries, if you dont give the battery love, balance the charging, dont use the bike untill it's a dead battery as often as possible, leave it out in the rain, you'll be asking for a warranty replacement . Last & not least the average consumer today demands excellent customer service & warranty's with an E-Bike there's too many intangibles as far as things that can & will go wrong if not used & maintained properly. I was thinking about becoming a dealer as many others were or are but I could imagine the headaches, plus I wouldnt want to sell them to anyone under 18 years old & some of the cheaper bikes with cheap lithium batteries & cheap chargers scare me as fire hazards..so theres a lot of concerns being an E-Bike dealer. Look @ companies like Trek they cut their E-Bike line in 1/2 something like that to 3 models. & I think Prodeco is in for a surprise offering a 2 year warranty..