CHICAGO (CBS) — Even with crude oil prices inching up a bit on Wednesday, Chicago area gas prices have been tumbling.

It’s no trick, but a treat at the gas pump this Halloween, with crude oil prices down overall in October, and no refinery problems reported, Chicago area prices are headed lower.

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At some suburban stations, prices are as low as $2.05 per gallon. The latest survey by found that to be the lowest price in the area.

Senior petroleum analyst Patrick DeHaan predicted prices will go even lower before year’s end.

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“In Chicago, I think, the city you’ll see some stations in the $2.20s, maybe the $2.30s. In the suburbs, you’ll see plenty of stations under $2 a gallon,” he said.

The Chicago average remained around $2.50 per gallon as of Wednesday, down nearly 30 cents a gallon in the past three weeks, but still well above the national average of $2.20.

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Some stations in the city still are charging $3.50 per gallon or more.