Very easy ! me in which species you are interested in, and how many specimen you would like. In the same mail, tell me what you have to offer, and be sure I will answer ! I only exchange papered specimens (spread specimens can have serious damages during transportation), usually A1 specimens or the best I can find, with full data when I have collected myself the specimen. Sometimes, it happens that some antennae are broken during transportation...

See my references for exchange !