for telegram, I have never bought a tank there before so I’m not sure . but what I know is telegram groups are filled with hobbyists, so the tanks and fish there are half the price of what you get from the store itself.
great condition 5-6ft tanks with cabinets on telegram groups go for only $600-$1k.
I have seen some deals on telegram of brand new 55g tanks only $30. You have to go collect from the hobbyists house