Actually.. it is really depends how much you would trust the website.. I am not a frequent shopper but i do shop online when i need to buy something cheap..
And i did experience both good and bad quality of product.. i bought sony headphones one time.. it is not that cheap, you can get cheaper at any physical store.. but the quality is not really good..
Other items i bought online is a dslr tripod stand.. this one is really good..
My advice is plan well.. what are the things that you would like to buy, if u dont think that it its not worth it buying online..dont buy online..especially for electronics that you would want to use for a long period..
Another advice is that use the promo, vouchers or discount that you get. It would be really helpful when u get a good value.. Example of the vouchers are like below..
https://vouchers.todayonline.com/klook-coupons/
https://iprice.sg/coupons/zalora/
https://iprice.ph/coupons/shopee/
https://iprice.ph/coupons/lazada/
Just like you have mentioend some of you links here, i also save few of the url which i used to shop for my travel and fashion deals..
For Travel and adventure: https://www.collectoffers.com/hk/klook
Fashion: https://www.collectoffers.com/hk/farfetch
Yes, agree with all the abovesaid points. Use promo codes to save money and get the best deal. I never shop online without using promotion codes. For example:
Travel and activities: http://getcardable.com/klook-promo-code
Online Shopping: http://getcardable.com/shopee-promo-code
Airline and Hotels: http://getcardable.com/trip-com-promo-code