Vintage AP undervalued ?

Saw a couple of 50s or 60s ultra-thin Audemars Piguet (way classier than any RO IMO), and I was wondering why do they go for so cheap ? (usually around 1K)
As far as I know it used to be one of the best brand back in those days.

So is it another fashion trend or ...

Only a thousand? I'd like to see these, because they usually sell for $2200 - $4800 in raw (read: unserviced) but cosmetically good condition depending on the model.

I should have specified that I'm talking in € 😁 and yes roughly up to 2 000€, but that's not what I qualify expensive for this type of brand.
(That was in Christie's or Sotheby's auctions results, I should post some exemples.)
(EDIT: http://www.bonhams.com/auctions/20749/lot/117/ like this one)
But speaking with other fellows about AP, we've noticed that it's all about Royal Oakes now. It became their flagship with a tons of (useless?) declension.
But what about the rest ? What about before the RO ? Erasing all the other models from their history of watchmaking for that... I'm perplexed.

That's in mediocre condition at best, and it might even be a redial. Need better pictures to tell. Besides, that's just the estimated hammer price.

Well fair enough, this one is a bad exemple, right.
But I guess usualy, hammer price are made by experts based on market trends, and these are what they expect for those watches to grow 💰
Here's in antiquorum, they don't seem to reach a top 2K

http://www.antiquorum.com/catalog/l...demars+Piguet&browse_all=1&page=1&q=thin+gold
http://www.antiquorum.com/catalog/l...demars+Piguet&browse_all=1&page=5&q=thin+gold
http://www.antiquorum.com/catalog/l...demars+Piguet&browse_all=1&page=5&q=thin+gold

(there could be things wrong with those also, I don't know AP well... but my desire to learn is limitless)

I'm not a member and don't really feel like joining to see the prices so could you tell us what the final sale price was? Also, these are all manual winds - the automatics fetch more money.



An original but mediocre dial. I have a 1969 Classique caliber 2003 in near mint condition that I paid $2300-ish for and considered that a fair price for it.



Looks to be in better shape, but did I read that auction date right? 11 years ago? As in, before gold went up and mechanical watch popularity went into overdrive?



Probably a redial, and these dual branded models hurt the value. That, and it's a 29 mm diameter - and again, an old result (10+ years ago).

Prices between 1.2 up to 2.1 (without buyer's premium)

Right these are old auctions, but I picked up what seemed to me better exemples than recent, redialed or worse condition watches. But still there not so many...

Do you have better exemples ?