1. Satugadget - Get your new phones, tablets at wholesale prices!
Considerably cheaper than most places. You can either buy online or go direct to the shop in KL to get it. You can sometimes get additional freebies when you buy at their shop. Just remember to bring enough cash as payment via credit card has additional credit card fee surcharges.
2. Direct D - Phones, tablets at wholesale prices.
Similar to Satugadget, you can either buy online or via retail in PJ. Best to compare the prices between sites to find out where you can save more.
3. Mudah.my - Malaysia's online marketplace.
You can pretty much get anything that you are looking for here. New or old, including phones. Just need to be aware of frauds, especially if it's too good to be true.
4. Carousell - Buy phones, tablets directly from owners or storeowners.
You can sometimes find really good deals here. Feel free to negotiate with the sellers to get a good deal as most people are trying to sell their stuffs off quickly.
5. Lazada - Malaysia's largest e-commerce site selling everything from groceries to electronics.
To save big in buying over Lazada, purchase via cash back sites like Shopback and purchase on selected days where you get additional discounts. Take for example, purchases made via Citibank credit cards gives you an additional 10% off.