150km round trip, two and a half hours on the road, with two stops along the way, and a little under $150 in total cost, I secured a box of vacuum tubes, a wheel from a plough, and a whole bunch of stainless steel fixings.
According to the guy selling the stainless steel (for $100), it was about $2k-$3k worth of material, which I believe. It was, again according to him, surplus from a job.
So these materials should prove interesting, both for making things, but also simple stuff, like if I need to make concrete plinths and bolt things down, I can embed these.