Due to slow downs and more frequent crashing the mid 2011 Mac Mini my parents had been using needed replacement. It didn't need to have much as all they really do is financing, web browsing, and light photograph editing. The idea was that it could be cheap and small in size. After rebates, this build was only $395 at the time of purchase.
CPU: Intel - Core i3-7100 3.9GHz Dual-Core Processor
I wanted to be able to get something with the new Kaby Lake architecture and at the price this was a perfect pick. While it does only have 2 physical cores the high clock speed and hyperthreading should help with that. Stock cooler fits just fine, but not much clearance if using an aftermarket cooler.
Motherboard: MSI - B250I PRO Mini ITX LGA1151 Motherboard
Does everything it's supposed to. While there is no included wireless, although we didn't need it to have it, there is an M.2 wireless expansion card slot(although the IO board doesn't have cutouts for external antennae). Has 4 SATA III and an M.2 slot hidden on the back, so storage can easily be expanded. That M.2 storage slot can also be used for Intel Octane if you so wished to upgrade speed down the line. Has a PCI 3.0 x16 slot if you wanted to pop a graphics card in there, didn't need one for our uses. Really nice and intuitive BIOS, even has customizable fan curves for PWM fans (haven't seen that before).
RAM: G.Skill - Aegis 8GB (1 x 8GB) DDR4-2133
As the mobo only supported either DDR4 2400 or 2133 for that CPU this one was kinda a no-brainer. Was actually the cheapest DDR4 2133 RAM available at the time of purchase, only $54. Wanted to get it in a single stick so I could expand without wasting an old kit.
SSHD: Seagate - FireCuda 2TB 2.5" 5400RPM Hybrid Internal Hard Drive
Although the selected case can support one 3.5" HDD I didn't want to have spacing issues. Wanted to get a hybrid for fast booting and such but couldn't get an appropriate size SSD for the price. Was going to get the 1TB model but was ordering on Amazon Prime day and the 2TB model was only $3 more at $63.
Case: Silverstone - Sugo SG13B-Q Mini ITX Tower Case
Opted for the Q version due to appearance. Plenty of space to accommodate a moderately sized GPU. Something not shown on any webpage, including Silverstone's site, it that the power indicator light is a wide blue light underneath the logo at the front. In addition the disk activity light is a red light that is in the center of that blue light. The reset button is not very convenient in that it is a pin hole. Some nice extras were rubber dampening rings for a fan mount (or even a small radiator) in the front and a cable routing clip, both with high quality 3M double sided tape. I have two complaints, first is that the large rubber feet don't have any support on the bottom of the case making specifically the front left one to cause the metal to sorta pop inward when setting it down and such and it's right underneath one of the 2.5" drive mounting spots, but it does spring right back if you finesse it just a little. Second complaint is the top hanging drive mounts, while there are cutouts in the metal to give space for SATA connectors, the drive is upside down meaning a standard right angle connector would jut into the top of the case and likely damage the cable and a straight one required me to really fight to get it in and I had to lay it over the PSU although there is enough case clearance to not squish it. Will likely stick with that or get a "left angle" SATA cable. As it could be fixed I don't blame the case, but the PSU SATA cables were all in line or right angle, making the bottom 2.5" drive mount impossible to use.
PSU: Corsair - CXM 450W 80+ Bronze Certified Semi-Modular ATX Power Supply
As estimated wattage under load was only 101 watts. I basically looked for the lowest wattage and modular or semi-modular PSU that had 80+ Bronze or above. Again there was a good deal, making this one only $26 after rebate, making it an awesome value (and the cheapest one). I think you would have to absolutely cram the cables in there if it weren't modular (not my style).
Case fan: Rosewill Case Fan
I believe this was an extra I had laying around likely pulled from my old Rosewill Challenger case. Has both a 3 pin and molex connector. Same fans as these I found: https://www.newegg.com/Product/Product.aspx?Item=N82E16835200072
OS: Windows 10 Education
Got a free copy through my school. Free $100 (give or take). Yay!