Automobilia collectors, please help WIW!

I have the opportunity to purchase a few items from a long time collector, I know these items are worth some good $.
I would like to have your opinions on the value of the following items.

Item #1; A double visible gas pump
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Item #2 ; A brass fire extinguisher

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Item #3 : Eco air pump

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All are authentic and restored, working? I don't have the model numbers and year...available at the moment, but that should not affect a ballpark value of these items.

He also has numerous porcelain signs, most way too large for home. There's a few old oil cans, I wouldn't mind picking up also.

Any comment welcome, I don't want to over-pay.

Thanks,
Giles