It's not the end of the story. The van was bought for 7500 and appeared for 13000PLN and as a 3 years younger. After a few days the price was lowered to 10500PLN.
Now it's for sale again... for 13200PLN and 4 years younger it really is

I'm really pissed off as I was going to buy it for the 7500 - just to preserve the lovely van.
Now it looks like some salesman bought it and is trying to earn easy money. It seems he will be selling it for a long time - I don't think here in Poland are freaks able to pay 3400EUR (13200PLN) for 20 years old van - only because it's unique

If there are - they will go for VW T4 as it's considered much more sexy than Transit.