Hello. I'm planning to purchase tomorrow a used Mac mini from 2015. It's the Haswell model, at 2.6GHz and 8GB of RAM. My only concern here is the RAM memory, but it is impossible to find a Mac mini with 16GB. And this model doesn't have upgradeable RAM, so I will stick with 8GB. The good thing is that it is pretty cheap. And it hasn't been used a lot. My only caveats are the integrated Iris graphics (HD 5100) and the 8Gb of RAM, but don't plan on playing videogames on a mac, I have a PS4 Pro for that. As long as it supports Metal API and handles smoothly the UI, I'm cool with it. My idea is replace this summer the original 1TB hard drive for an SSD, when I have time to disassembly it. It seems pretty easy. After the purchase of an iPad Pro 11" and this 2014 Mac mini I will be able to replace my 2010 13" MacBook Pro (which is aging, the Bluetooth is not as reliable, lacks continuity, AirDrop to iOS devices, and other features) with a Mac desktop and a iPad as a portable device. I think it is a good combination. My plan years ago was to replace this old 2010 MacBook Pro for a new MacBook Pro, but at this point with the reliability issues I've decided to not get a new MacBook Pro until the next redesign, which may be still far away, and probably will cost more than 2.000$, which I can't afford now. If anyone knows what may I be missing with the 2014 2,6 GHz Mac mini compared with the new one (aside from the T2 crashes and half the CPU compute power), just let me know. But this machine costs less than half the price of the 2018 basic mac mini which only carries 128GB of SSD storage. And I expect this 2014 machine to last 3-4 more years of macOS support. I guess an Intel i5 2.6 GHz Haswell CPU will be a significant upgrade compared with my 2010 13" Core2Duo MacBook pro with the integrated Nvidia 320M. Also I will be able to AirDrop files from my mac to my iPad Pro and viceversa, something I wasn't able to do with my 2010 MacBook Pro because none of the handoff and continuity features were avaiable.