Which is still slightly useful - I've got two Dell Wyze 5070, fanless, and being able to load them with 16 GB of ddr3 ram each for a song meant they were basically an obvious upgrade from being so cramped for RAM running a Raspberry Pi 4.
I should probably sort through some old boxes and eBay stuff I've saved for no reason in particular, not like it's (I hope!) going to get any more valuable than it already isn't, and I'm not realistically going to build Frankenstein DDR1/2/3 systems rather than use a more modern and low-power Pi/SBC or NUC for the purpose, even if I need to buy the latter!
If you're okay with DDR3-like memory bandwidth you can get that cheaply on a modern system by getting Intel Optane NVMe/PCIe media (solid state storage much like NAND, but wearout-resistant well beyond even the best SLC NAND) and setting it up as swap. If you're either memory-bandwidth bound (common for local AI, not so much otherwise) or not OK with the power reqs of Optane, you're going to need actual expensive DRAM.
https://www.parkytowers.me.uk/thin/wyse/5070/