There are lots of mid-price clothing retailers across Europe who produce reasonable quality clothes (better than Primark quality). I find it hard to believe these stores sell poor quality chinos, jeans, etc in the 30-50 price range.

Having said that, I'm sure everyone has a story of how a cheaply priced item of clothing turned out to be of better quality and durability than a equalivent expensive item.

(Aside: In the UK, I'd place clothing retailers like John Lewis and Marks & Spencer in the mid-price to high-price category.)

In Germany, there's also the excellent grundstoff.net, which has remarkably cheap basics that are still of high quality and fairly produced. Highly recommended to anyone who is in Europe (though I don't know whether they deliver outside the EU).