Quantity   Component name
1 × 1 priceless antique/relic Dell Dimension E521 AMD Athlon 64 X2 dual core, 2.2GHz; 2x 512MB DDR2 PC-4200 (533MHz) DIMM RAM; Plenty for pfSense
1 × Intel I350-T4 Quad Port 4-Port PCI-E Gigabit Ethernet Server Adapter just over $40 used with shipping and taxes. Needs a full height adapter
4 × 512MB DDR2 PC-4200 (533MHz) DIMM RAM Had two extra sticks laying around. Tried some 800MHz sticks but one was faulty and I didn't want to wear out the slots unevenly
1 × 4-Pin Dupont Header to USB
2 × 32GB Sansdisk Cruzer USB 2.0 media One for the installer, one for the Boot/HD; $13.68 new, Amazon; Onboard USB is USB 2.0, I don't want to mount externally.
1 × 250GB HDD this used to be my old macbook pro hard drive circa 2008. It still works, somehow.
2 × 2GB DDR2 PC-6400U (800MHz) DIMM RAM 1.8V, 240 Pins $16 on Amazon