agree!!!
我家的冷氣 have water 'drop' last summer. I ask my friend to check for me (he is a C F). He find that the plastic cllector has cracks. He told me to go for 電器鋪 to buy one. It cost around $10-18 (depends on size).
Then, I go to this shop and buy a small one. When I pay for it, the man (boss) ask for $80.
Then, I call my friend and told him it costs $80. He told me don't buy it. He will buy one for me in Mong Kok the next day. It costs $1x only.