Well, after searching here and there in the forums and because I didn't find the answers, I list them here:
1. Actually, can one start an auction here in this forum? (no eBay
2. Is there a specific auction guidance - step by step?
3. How are the bids received - is it via PM?
4. Is there a must what currency to be used?
5. Is there a limit or recommendation how many images to be used in a post? Is it a problem if some lot contains 25-30 images?
6. If there is one, how is the winner announced?