@marcoi do you need to upgrade for any reason?
Not really other then getting the upgrade bug and wanting to play with something new... I guess from a pratical perspective, using less juice is also a consideration since the box is idle most of the time.
I guess I am just trying to see if the move to a newer platform would make sense and then see what the older hardware would fetch to offset the newer stuff costs.
I think if the net difference in cost is less then 300ish I might go for it. Over that i would have to consider if the platform upgrades (lower Idle/better perf,etc) would be worth it.
Update:
I just did a quick compare of pricing.
selling off the old MB/CPU and Ram at current ebay prices is roughly 500ish assuming someone buys it.
New MB, i3-8100, 4x16GB ddr4-26xx mem before tax and shipping is roughly 1300. so double the costs of old hardware.
I would get 2x memory, maybe a little better performance and idle power and an extra pci slot over current setup. For my use case not sure it is worth the price difference.