WANTED : TRANSPARENT OVERHEAD PROJECTOR

Hi i am looking for a used transparent overhead projector that is still in good condition. I have some projects to draw and these machines would do the job but they are hard to find. If you have a used one and you are not using it anymore, I would love to buy it for $15.00 as long as it works good.

Please include a picture with your response. I hope to hear from you soon.