I have the Lenovo TS140, with an i3 and ECC. I got it on sale, from Amazon, for $220 years ago. While the model I bought had 8GB ECC installed, I added another 4GB stick from Ebay (for $20), for 12GB total. So far, it's been flawless.
Based on my usage as a file server, with a couple dockers and a couple direct installed add-on's, it has been more than enough. I've never seen the CPU anywhere near 100%.
The Pro's:
- Low Cost, ECC, power efficient, and more than adequate performance.
- For home users who may store it in open living spaces, this box is whisper quiet - nearly dead silent. (One would have to get next to it and really listen to hear the case fans.)
The Con's:
- It supports 2 drives easily. If more drives are needed / desired, they won't just drop in. There are empty bays but this will require an adapter. I've done this to add a 3rd drive.
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For those who may interested in the TS130, here's the user guide with spec's.
Edit: I believe this is the -> Ebay listing for TechnoDad's TS130 server. (31Mar2019)