Hey friends, I'm looking for any suggestions on upgrading my toaster (or building a new rig would be the most logical choice, huh). I don't mind picking up used parts so suggestions on reliable/tolerable places to find them would be great (ebay?).
I do not video edit nor play current AAA games so I'm looking to stay on win7 and 1080p 60fps fine with me. I just want to build a decent rig and futureproof it for another long while like this current rig has lasted me.
Also any advice on storage? ATM I use a stupid small SSD for my OS and a 3TB external for storage (manga anime movies games the usual). The external has lasted a surprising long time. I figure I'll probably be okay grabbing a cheap 1TB SSD for OS and whatever games I'm currently playing, that sort of thing.
I am an extremely poor person so the cheaper the better. I figure with some used parts I could probably build something decent for <=$750. I already have monitors/keyboard/mouse. Most expensive items would be what, storage/CPU/GPU? Maybe the logistics of a new case, maybe a new mobo. Advice on what to buy new and used would be cool too. Just thinking out loud.

>tl;dr help me build a windows 7 60fps 1080p 4chan browsing device
Thank you xoxo