I think you need to be very careful making statements like that if you really don't know your stuff.
I can categorically state NONE of those Lanvins you have posted are counterfeit. I personally own a pair of the silver ones you posted as well as patent black and perforated black.
The first pair you posted are from one of the best luxury footwear sellers on eBay, be-luxe
Making statements that fakes exist?
Well...
I admittedly don't know Lanvin. I've hammered that home.
But I do know this: the site that I got those photos from is a replica site overseas that has 9 more photos of the same shoes.
Replica manufacturers are thieves of designs by trade, stealing photos should be no shocker.
I didn't go browsing ebay and decide randomly to proclaim to you that certain shoes are fake so please dont be condescending. I'm not trying to offend you and I whole-heartedly apologize if I did.
I'm just relaying the photos that I've seen from a counterfeiting site with feedback on how good their Lanvin replicas are.
How you use that info, if at all, is up to you-OP.
I happen to like Lanvins. Never handled them IRL but love them in magazines on stars. Would love to learn about them and hope to perhaps purchase some on ebay one day that are authentic and reasonably priced, so I had a genuine interest in the OP's concerns.
I've been on ebay 8 years buying and selling other designer brands and shoes. Usually my forte' is LV and as an avid buyer of their shoes priced in the same bracket- a $500 shoe selling used for less than $250 can usually be considered a "too good to be true"...or a style that isn't of a popular style in recent years. There ARE exceptions, as with every rule.
As I said previously, if I were you - OP- I'd probably bid on the auctions. I wish you tons of luck!