Oh yar...forgot to tell u guys not to include questions like :

Why is the pleco so expensive ?

(Its like comparing cars. Why is a BMW costing more than a Kancil when they are still cars ? To some, a car is a car regardless of what kind of car it is.)

Where to dump my plecos ? Anyone knows where is the best place ?

(U shouldn't dump them at all. U should think of that first before buying them. If u do not want them then give them to a lfs or worse comes to worst, put them to sleep. Never dump alien species into our local ecosystem as it will cause instability to it regardless even if the alien species looks harmless to you.)

So i have answered some of it above for the new comers or "just-in-case" viewers that are interested to know...