yes this is what i usually do
Problematic seller will usually get complained very quickly, so make sure to read the review of the device and also the seller carefully.
Just be careful of  unbelievably cheap phone deals (like P20 going for 1K vs RRP 2.5k)

Have gotten an Galaxy A7,Galaxy A8, Note 5, S8+ and my current Note 9 off lazada and 11street, no problem so far.

I'm looking for new phone, and found it dirt cheap in Lazada, 11th Street. However after placing order the vendor told me to cancel and only deals it buy phone directly from them. Reported it to Lazada and they did not take any actions. Instead Lazada cancelled my order and refund.

Have anyone experience this? Anyone knows why these vendor can sell the phone dirt cheap? Not being naive, but I did get good bargain items from Lazada and 11th Street previously, but never encountered anything like this recent experience.

I.e. Huawei P20 Pro is selling at RM1.5k

Just do a quick search for P20 Pro and set filter, you will find it