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So, first you payed the oil companies whatever they wanted and now you shall pay Tesla whatever they want. Next up, every government wants to have tax on that. Hassle with cc or paypal, paperwork etc. If I there is no prepay when order solution I lost my intest in Tesla.
Power seats can be an option, the rest should be standard, like leather seats. Think the options will be more tech, like awd, dynamic led headlights, dynamic chassis and AP.