Im looking at a Guerlain Gourmand Coquin that’s New with Box, but that box looks like it’s been used to prop up a wobbly table in diner for 17 years. One side is all bleached out and possibly water damaged, only god knows what conditions the bottle was subject to. No returns accepted. I feel like if you’re rich enough to gamble on things like this, you wouldn’t be shopping on ebay for them. 
Ebay can be hit or miss. I`ve been lucky to be able to find some long discontinued gems that were in pretty good condition. But I`ve also ran into conmen, who basically took my cash and never delivered. It took some hassling, but I got my money back in the end.
If you're talking about a full bottle, obviously if I'm seeking out a rare perfume on the secondary market it's because I really want it, it's not available new, and it's rare enough that I don't think I'll be able to swap for it. There is absolutely no reason to blind buy a rare, read expensive, scent you don't know if you'll like. Even rare fragrances can be sampled, you just have to have the patience to wait for a sample to be available for swap.
Buying rare perfume on eBay is risky, especially with damaged packaging and no returns. Storage conditions matter, and a faded or water-damaged box could mean the juice inside is compromised. If you’re not willing to gamble, it’s best to stick to trusted sellers or fragrance communities for rare finds.
I agree. That’s why I do not use it anymore.
