Amazon is your friend! A lot of parts there are cheaper such as power supplies, HDDs, SSDs, and RAM!
Parang Shopee na lang yang Amazon ngayon. Free delivery pag 2700+ PHP above straight to your doorstep na yan.
Pag 10K above ang price may import fee na kaya dapat hiwalayin mo yung orders mo. Kaya goods dito pag PSU, HDD, SSD, and RAM lang bibilhin mo kasi generally below 10K sila.
Down side is kapag defective or need iclaim warranty ikaw maghahabol dapat doon haha tapos papadala mo sa manufacturer. Pero so far mag 1 year na tong system ko wala pa naman problema.