You can do much, much better on eBay. I have had a lot of sticks running in several servers for years without problem.
Buy from a seller with plenty of positives reviews who is local to your country and I doubt you will have a problem. You can easily get 64Gb of the exact same memory for the same price.
I bet you would find takers on r/homelabsales.
I’ve been using XCP-NG for years and love it. I have a cluster of three servers, multiple NICs including 10GB NICs and multiple VLANs. It’s been easy to configure and run.
I’ve configured multiple virtual networks, a PXE environment, multiple Kubernetes clusters, and more. I’ve never had so much as a hiccup from XCP-NG.
Highly recommend it.
You could get a decent Dell R730 for under $600. Big rack mount server, but they are a great deal if you have room for them.