Not really a 'Gaming' system, but for a start to a 9yr olds Computer Life this may be suitable.
I have an AMD system that I built for testing and messing about that Id be happy to get rid of.
Specs are:
A320M Chipset
8GB Crucial Ballistix RAM
AMD A10-9700 APU + Brand New Stock Cooler + Ryzen Wraith Stealth Cooler as well
R7 370 2GB MSi Gaming X GPU
550W Thermaltake PSU
I will add in a basic chassis as well as build the whole PC for free since it's a pleasure to build a pc.
I can provide screenshots etc if requested
Not a good idea to post your number and email like that. Rather pm him bud <3