I love my electric bike, its the tidal force m-750
its a foldable mountain bike and is pretty awesome ( its a version of the Montague paratrooper frame )
for years it was considered the e-bike to get because unlike others at the time it was one of the only mountain bikes rather than city style bikes that could be foldable and thus made it great for commuting as well as offloading.
unfortunately the company that made it went under years ago, but silver lining its one of those eclectic things that has a underground following and a still active google group.
best off the company that does warranty service still exists so people are able to refurbish them still.
last year i convinced a buddy to track one down he found it for less than $400 and got fresh batteries for a few hundred more.
I myself a year and half ago had them do a battery replacement and they were even able to unlock the motor to be 1000W vs the stock 750w (so technically i have the M-750X now not the M-750) basically i can go faster WOOT!!
the non X model is Range with only Front Hub Battery 20 miles (32 km)without pedaling, more with pedaling.
(you can add removable 3rd party battery packs either instead of or addition to the hub) with a maximum Speed of 20 mph (32 km/h)
or the X model is up to 20 miles (32 km) without peddling, more with peddling and a maximum speed of Up to 25 mph (40 km/h)
if you want to put in the legwork to find one i still think especially for the price it can be a excellent option