Yeah, I see a lot of deals too good to be true from Russia. Trust me, I know to avoid these like the plague. Patience also isn't one of my virtues, and I haven't seen many great deals for vintage Guerlains when I browse eBay occasionally. I have seen some Vintage Heritage EDTs lately, and I thought about grabbing one, although I have the current version and it really is no slouch.eBay for me. Going rate for 1/4oz of Mitsouko extrait is ~$70-80 for a “available today and buy it now” sale, which isn’t cheap by any means but actually a great deal cheaper than current production Mitsouko extrait for which Guerlain charges f-you prices. Better deals of course available with patience, discernment, risk tolerance (though avoid the cheap sales from Russia, is the word on Base
Going rate for other old guerlains varies a lot, last couple times I checked vtg Shalimar was more than Mitsouko but not by a ton, and vtg Jicky was crazy expensive relative to both. My bottles of Habit Rouge EDC and Heritage EDT were in the $60-70 range for unopened early 90s production if memory serves. So more than current production through a discounter but not bad at all compared to virtually any current niche.
On that subject, wearing vtg Heritage EdT today. Making me wish I owned a pinstripe suit, not that it would get much use anytime soon.
I guess I have to keep looking, but I find the current EDP formulations of Mitsouko and L'Heure Bleue to be very good and worth them $50-60 that they sell for online. I've come close to buying them, but I'm thinking that if the vintages are available for reasonable prices, why not go for them instead? I know for a fact that I won't wear them that much due to their lack of versatility, so buying vintages wouldn't be a big financial hit it the long run anyway. They're not as cost-effective as new bottles, but they would be exceptions.