You can get a new 3 group Aurelia auto for 7-8K. Not much compared against the rest of your costs. Other comments are true regarding thermal stability, etc.. I have seen more than one convert from LM to Aurelia.
Another inconsistency is a stand having a 3 group. If it truly was a stand, that is a big machine.
There are some reconditioned LM Lineas on the eBay that come reconditioned and some limited warranty. In fact, one is up for probably it's second time in 3 months, a Nick Pratt mod with a PID. It sold for under 2K a couple of months ago. I am guessing the current seller got hold of it, reconditioned it a bit more, then is spinning it at $3500. Never mind, it's gone.
But there are some others up there.
For this piece of equipment, I still say buy new. You can get other fine pieces of equipment for much less than the Aurelia, if you need to keep the price down. The cost of a broken machine will quickly destroy any savings you made on the purchase.