Budget 21-30k Budget Gaming/Productivity build


Guys need advice on a ryzen based 1080p gaming productivity wfh build. I have retained my 4 yr old cx500 80+ bronze psu from my previous build. And have a ant e sports ice 100tg case as well.
Looking to spend not more than 30k on Mobo+proc+ram and squeeze in a new or used GPU.

Probably a 3300x + B450 board + 8gb 3200 + used GPU is what I'm looking.

Can you guys help me with exact combos