I seem to have done better than many here judging from the negativity, but with all my Leica/Leitz purchases I've only had one issue and eBay returns are generally so easy, what with the scanning return codes that you can just show the post office on your phone....buying used binos on ebay was great fun so far. There rarely was a real "lemon" that was unfixable or just plain garbage.
I think it's great that there are a lot of members here who don't need to concern themselves with making their dollars stretch, but if I'd bought strictly from the forum approved resellers or new, I'd have less than half of the total number of binoculars I have now, and probably still be missing a couple that might be impossible to find other than eBay.
I'm with you at least in part, and will continue to buy from them, and possibly picking up deals that will be frowned upon from those who refuse to trust that they have the ability to discern the difference between a good potential purchase and a scam/piece of junk or overpriced item.