They're not Jacobsen but they could be really nice in the right fabrics. Yes, they are worth selling. (This is not the place for getting appraisals, though. See rules.)
I'd chuck the floral covers if you can get them off easily. I'd rather see old, worn, original fabric than that fabric.
I see chairs like this a lot here, comfortable and usually in very well fitting top (king?) Stitched vinyl, aside from the horror of the mateial in the sub tropics the quality is really very good.
Then I look at the typical mid range armchair available now and wonder if we havnt gone backwards.
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