Difference between ASOS and ASOS Marketplace from my understanding: ASOS is like any any other online retailer. They sell their own brand and other brands associated with them. ASOS Marketplace is similar to eBay where any qualified independent boutique can sell their stuff on the platform with ASOS taking a cut.
Although the sale advertises 50%, there are some items showing as 70% off.
Limited time only, while stocks last; Up to 50% off on selected ASOS Marketplace items marked on site. Ends 23:59 BST on 14/04/16. Not valid with other promo/discount codes or delivery charges. If individual boutiques are discounted, the higher discount will apply. Shipping exclusions and restrictions may apply to individual boutiques. Shopping FAQ
Shop Mens (6505 Items starting from $1.07)
Shop Womens (17618 items starting from $0.53)
Many super cheap items, get bargain hunting and share them on the comments!
Prices are cheap but unfortunately shipping is quite expensive, good if you're buying multiple items from the same seller I guess.