$549. No throttle, On/offswitch, I did say throttle, but I didn't see the 20" option. Thanks for the correction!
Add $489 for the Dahon Vybe D7. Close to the OP budget, and definitely a better folder bike to start with, Likely a lot lighter too. But it's 24V and push button. That's primitive. In my opinion, the $749 kit is better for most people.