With everyday bicycles selling for $100 and up at the larger variety chains it’s a good question? Online E-bike Conversion kits start under the $1,000 mark.
Standard, IE not e-bikes, at the specialty bike stores start around $1,000 typically $2,000 and head fast to the value of a 2-3yo used motor vehicle. Apparently shaving a kilo of the bike weight saves. I’ve several extra keen riders in the extended family who at 60+ can quite comfortably complete Hundreds of kms in a day. No ‘e’ required although the commitment to their rides in dollars would buy a popular small family sedan.
Whether the price difference of high quality alloy or carbon fibre frames and wheels, disc brakes, and a host of other features justify the difference? Yes, there is a marked difference in the ease of riding a well set up competition style or training road bicycle when compared to the K-mart and Big-W hacks. Durability might be another difference.
I’ve ridden casually e-bikes full frame with derailleur system and pedal mounted drive motor. I now use a folding portable e-bike with front wheel hub motor and 3 speed rear wheel hub gearing. They all do the same job for me.
As an aside there appears to be premium pricing for most renowned brand imported bikes compared to OS pricing, E-bike and not E-bike alike.