my gpu used to be my dads, the cpu was from my old laptop, hdds used to be my dads, mouse and keyboard were a gift, gaming case was "new" at a computer shop for $25, screen was on sale at best buy for $70, (it was like $90 not on sale and ive seen lower end models of it sell for $100 at other stores) mousepad was 50 cents at a tag sale, chair and desk were used at a tag sale for $25, motherboard was from ebay for $15, the printer was from a tag sale for $7, dvd rom came from our basement, and the high speed cd rom was from my old used business desktop. (i dont use the mobo from it because it had no agp port or anything for a video card) so, i paid a total of $142.50 for my computer workstation.
why is your pc so low spec? mine costs me $110 total ($70-screen $25-used gaming case $15-used motherboard) and is better than yours. its still kinda outdated though but i overclock the gpu which helps A LOT.