Value of Kendall oil clocks

See these type clocks on eBay all the time. Are these even real? I've always wondered.

Yes,they are real,want to know value,Saw on eBay from 250 to 700.By the looks of it is whatever you can get..See you are a Sunoco collector.Our family ran a Sunoco station from 1931 until 1990.Then just ran as repair shop.I am looking Sun caduceus.

Would like to see pictures of your Sunoco collection.Like the rocker can.

I have the clock on the left. I paid $250 for mine but it has been a few years ago. I value mine at 300-350.

That was what I thought it might be worth. Thanks for the info.