It is very hard to guess at what it would be worth without seeing the particulars. Yes, the maintenance wouldn't be the same as a conventional vehicle, but that doesn't mean it'd be maintenance free. Personally, I only spend $1200 a year right now on gas, oil, and other items that would be dropped with an EV. Over a ten year ownership that would be a significant savings, but it could be all offset if the car needed new batteries after that.

Plus, a 200 mile range with a 4-6 hour full recharge time is somewhat unlikely without changes to our electric grid. Really a 10 hour recharge is more like it.