A lot of discount perfume, discount cologne can be found in Quiapo or Divisora, mostly by peddlers on the streets. I don't buy those even if they have brand names showing. I'm pretty sure that the quality would be poor. Even if I bathe in cologne, the smell would disappear after a few minutes. Or the chemicals in the cologne could react to my skin and give me a rash or worse. I prefer getting the real deal than get anything that's imitation.
On the other hand, I am a fan of discounted colognes. The kind that I always buy are branded kinds but being sold by reputable merchants at a huge discount.