It's not often I'll call out a specific shop or brand here on the blog, but I wrote an article a few years ago on another site which receives an enormous amount of traffic for the search phrase "Mango Outlet" and I only mentioned that in passing when talking about the various bargains Barcelona can offer for the thrifty shopper.
This central one is a fairly decent sized shop and you can see from the pics here, it's a nicely managed place, not just a mad rush with loads of mounds of messy items. Although it should be noted that it was an early mid-week morning ! The store is mainly women's fashion, but there is a really small section of men's stuff if you fancy prancing around like Gerard Pique.
Any readers got some more tips? Fans of Primark for more bargains? Please let me know in the comments! And if you're looking for Barcelona accommodation this Autumn, check out BCN Rentals Apartments for some great, late deals. And for a quick look at the rest of the city sights, their guide to Barcelona is another good read.