I have a Dell Optiplex 9030: OptiPlex 9030 All-in-One Desktop with Optional Touch Screen | Dell UK I was planning on listing for sale shortly.
23″ 1080p screen, Intel Core i5 4590S (quad core 3Ghz), 8GB ram, 500GB hard drive, Windows 10 Pro (free upgrade from Win 8 Pro). Looking at The Sims 4 system requirements, it should run. Would be AIO only (no keyboard/mouse). A neat feature is that it has an HDMI In port, so you can flick between the PC and another device you plug in if you want.
I’m based in London but I will be in Manchester on Saturday 30th, so could potentially deliver.
If you’d be interested let me know and I can take some actual photos.