Anyways, I've searched prices in the Philipines. You would not want to buy an i3-6100 new. You can buy faster components for less money. Many parts are hard to find. I've put together the best list I can. This build is much faster than the used system you are interested in. I only list these parts as they are cheaper to build new than an i3-6100 system is new.
CPU: AMD Ryzen 1200
https://pcx.com.ph/product/amd-ryzen-3-1200-3-1-ghz-unlocked-quad-core-processor/
Motherboard: MSI-A320M-DS2
https://pcx.com.ph/product/gigabyte-ga-a320m-ds2-motherboard/
RAM: Kingston 1x8GB DDR4 2133Mhz (I'd prefer dual channel or faster but could not find any)...