Used car prices continued their slow decline in May, but certain models are seeing a big uptick.

The average price of a used vehicle dropped $193 to $34,199, which is still 16.9% higher than it was last year, according to iseecars.com.

Breaking out hybrid and electric cars paints a very different picture, however.

Prices for used hybrids like the Toyota Prius were up 32.1% to $34,372, while electrics rose 37.7% to $58,165.

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Toyota prius

The Prius remains Toyota's most fuel-efficient vehicle without a plug. (Toyota)

The top models driving the increase were the Hyundai Sonata Hybrid (47.8%), Nissan Leaf (41.4%), Tesla Model S (39.0%), Toyota Prius Prime (38.0%) and Toyota Prius (36.35).

Nissan LEAF

The Nissan Leaf was redesigned in 2018. (Nissan)

"The rapid increase in gas prices over the past few months has led to a surge in demand for hybrid and electric vehicles," iSeeCars Executive Analyst Karl Brauer said.

Tesla Model S

Used Teslas are in demand as the production of new models has been limited. (Tesla)

Hatchbacks, wagons and sedans, which are the lowest-priced segments, also saw higher than average increases compared to last year, while pickup prices were only up 6.7%.

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"Small cars have become the only affordable used car option for a growing segment of the population, and their price increases reflect the high demand these otherwise low-demand vehicles have experienced in recent years," said Brauer.

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These are the 10 vehicles with the highest price increases by percent since May 2021 in iseecars.com's study:

Hyundai Sonata Hybrid 47.8%

Nissan LEAF 41.4%

Tesla Model S 39.0%

Toyota Prius Prime 38.0%

Toyota Prius 36.3%

Mercedes-Benz G-Class 35.7%

BMW 3 Series 34.4%

Kia Rio 32.9%

Toyota Avalon Hybrid 31.9%

Fiat 500x 31.6%