I expect that it's because they have decided they don't want to or can't sell film any more. There's unlikely to be anything wrong with it so long as it's in date.

I would grab as much as I could afford. You can always sell it here or on eBay if you don;t like it or don;t want to use it. I'd certainly take 10 rolls at that price, even with postage to the UK (which can;t be more than 5 or 10 EUR) it would be a bargain