I have aproximately 125 slides of orchids taken by Merkel from the 1940's-1970's. They were mostly taken at shows and conferences and are of all species, subspecies, etc of orchids. Most are labeled w/ hand-written names, dates, and locations. I would be interested in trading for irises but not then does anyone know where I can sell them? They should be worth something to some one that grows/collects orchids. I quit growing and selling about 10 yrs ago. These slides were given to me by Merkel. They are not very visible here, but they are free from scratches and the printing/writing on them is clear.