Tesla's used car prices are dropping

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Tesla's had a roller coaster start to the year. Shares tumbled over 30 percent, driven by falling sales in China, possible competition from hybrid vehicles and uncertainty around more tariffs.

Investors remain split: some see Tesla as an unstoppable EV leader, others worry about its pricey valuation and new entrants undercutting its market. Meanwhile, Tesla's big expansions need cheap materials, yet President Trump's proposed import duties on steel and aluminium could raise costs.