With a few inexpensive upgrades (ram and SSD), this early 2009 mac mini runs Mojave surprisingly well : r/mac
Apple Mac mini A1283 Desktop - MC239LL/A (October, 2009) for sale online | eBay
A-Tech for Apple 8GB Kit (2X 4GB) DDR3 1067MHz / 1066MHz PC3-8500 SODIMM MacBook, MacBook Pro, iMac, Mac Mini (Late 2008 Early/Mid/Late 2009 Mid 2010) Memory RAM at Amazon.com
Mac mini Server 2009 Memory Installation Video - YouTube
Apple Mac mini (Late 2009)-Upgrade to 8GB RAM/256GB SSD/Mavericks 10.9.1 (GR) - YouTube
Apple Mac mini Late 2009, 2.26 GHz, 2 GB RAM, NO HDD - No Power | eBay
Memory Upgrades for 2009-2010 Mac mini Unibody Models
8GB -2x4GB Memory Ram Upgrade Apple Mac Mini-3.1 Late 2009 2.53GHz MC239LL/A | eBay
Mac mini (Early 2009) | Macworld
Macminicolo - Mac mini hosting - 2009 Mac mini first look
A-Tech 8GB (2 x 4GB) PC3-8500 DDR3 1066/1067 MHz RAM for MacBook, MacBook Pro, iMac, Mac Mini (Late 2008, Early/Mid/Late 2009, Mid 2010) | 204-Pin SODIMM Memory Kit at Amazon.com
2009 2010 Apple Mac mini IMAC macbook pro memory RAM 8GB 2x4GB DDR3 1066 1067
Upgrade or install memory in your Mac mini - Apple Support
Memory Upgrades for 2009-2010 Mac mini Unibody Models
How to Install Memory (RAM) in a 2009 Mac mini (Macmini3,1) - YouTube
Macminicolo - Mac mini hosting - 2009 Mac mini first look
A-Tech 16GB Kit (2x8GB) DDR3 1066MHz / 1067MHz PC3-8500 SODIMM RAM for Apple MacBook (13 inch, Mid 2010), MacBook Pro (13 inch, Mid 2010), iMac (27 inch, Late 2009), Mac Mini (Mid 2010) at Amazon.com
4GB NEMIX RAM Memory for Apple Mac mini 2009 & 2010
Upgrade or install memory in your Mac mini - Apple Support
Mac Mini 2006, keep it as 1,1 or upgrade to 2,1 | MacRumors Forums
CMS 8GB (2X4GB) DDR3 8500 1066MHZ NON ECC SODIMM Memory Ram Upgrade Compatible with Apple® Mac Mini "Core 2 Duo" 2.0 (Early 2009) - A35 - Walmart.com
8GB (4GBx2) Team High Performance Memory RAM Upgrade For Mac mini “Core 2 Duo” 2.26 (Late 1 2009) MC238LL/A Macmini 3,1. The Memory Kit comes with Life Time Warranty. at Amazon.com
