We recently purchased this chair and we can't find out the designer or what it's value is.
Does anyone know what it is and what it is worth?

It looks familiar, I'll go check Google.
Could you find a date anywhere?
(not on tag, try stamped on legs/bottom of feet.

EDIT:
I did not find what the chair is, however, I DID find someone who should be able to tell you what it is:
[email protected]
Email her with "Karpen Furniture" in the title, and include your pictures, and she says she should be able to help you with this mystery. However, she DOES NOT do valuations:
"Note: I do not give valuations because I am not an antiques dealer. However, I can help you with dating your Karpen pieces." -SKarpenFurniture.com

Thanks for checking this out for me. No date anywhere on the legs or feet. We contacted Emily Rose and she wasn't sure what designer, but she gave 3 possibilites of deskey, kem weber or loewy. We searched for hours on each of the designer and couldn't find a match. Thanks again for doing some homework.

No problem.
Sorry you're results were lacking.
I'll keep looking when I have more time, and will update if any results.
Good Luck!