Actually you should purchase all the parts from the best manufacturer
then either assemble yourself(these days its very easy). Or ask some
Hardware engg to do a part-time.(dont pay him more than 500).
Get
Intel Processor
Hundai RAM
TVSE Gold KeyB
CD D Samsung.(Check for duplicate) the BIOS should detect it.
MOTHER BOARD- MERCURY, MICROTEK, INTEL ORIGINAL(a bit costly)
SEAGATE HDD
Samsung Monitor. Dont go for 15’ unless u really req
Logitech Mouse(Check 2/3 shop and you will know which is original)
What else if left?/
You will get a nice PC! Even better than the branded one!
REMEMBER TO GET THE WARRANTY FOR ALL THE PRODUCTS!