I think the term "job lot" is weird. 😀 But I've bought some bulk lots of motherboards and video cards a few times.
A lot of 24 AGP video cards that I bought 10+ years ago has to be the greatest collecting score I ever had. At the time it was pretty good. Today it's just absurd when I look at the list vs what I paid. Much of my video card collection came from that buy.
I bought lots of CPUs a few times. Once was socket-370, once or twice with socket-A, and a few times with slot-1. I wish I had done it with Pentiums.
The socket-370 and slot-1 lots worked out well. Socket-A CPUs turn up dead an awful lot though. I'm not sure why so many people managed to break these, but they did.
I didn't have a lot of bent pins because the ones I bought were not advertised as "gold scrap". Straightening CPU pins is tedious and never seems to be fully achievable to perfection, so I dislike having to do it.
Anything from mPGA478 onward I *really* don't want to mess with bent pins. Socket-370 I can manage but I still don't like it.
Slot-1 is mostly bulletproof but a lot of those CPUs in bulk lots came from retired rackmount servers or something, equipped with cheap tinfoil heatsinks that can't be used without a wind tunnel to cool them.
I actually bought another lot of cheap slot-1 CPUs once just for the purpose of stealing their heatsinks. As a result I still have a bunch of bare P2 350MHz CPU cards now.
Bulk motherboards were lucrative sometimes, a waste other times. A long time ago I got some bulk lots that I wish I could have back, but they were sold off. I did keep a variety of interesting boards over the years though and have a sizable collection of them now.
I'm not sure what to make of "gold scrap" - I doubt very many people actually buy these for gold. It seems like it's just a weird search term everybody has learned to use, and a way for the seller to say "These will be jammed into a box as cheaply as possible with no protection". That's why I'm hesitant to buy things listed with that term.
Most recently I bought a "gold scrap" listing for 2 or 3 socket-7 430TX boards. I was a little worried about shipping damage but I don't believe in trying to change terms after buying something, so I didn't want to ask for much. Knowing the seller had probably already figured on a particular box and shipping cost (and hoping it wasn't pre-boxed), I only asked the seller if they'd be willing to put some scrap paper between the boards so they wouldn't be as likely to scratch each other up. When the box arrived the boards were individually bubble wrapped. It probably bulked up the box and made it more expensive to ship (and I wasn't paying much more than the likely postage cost) so that was an unexpected and nice surprise. The boards worked perfectly so that was a win.
Many years ago I used to buy bulk lots of motherboards, test/recap them, and sell them. There was one bulk seller who I tended to get a good yield from, but then at the end I started getting boxes full of DOAs. Stubborn as I am, I *still* have those boards, thinking one of these days I'll figure out what's wrong with them (they're mostly identical boards with similar symptoms).
When I moved I had to throw out some of the most hopeless parts, and boards I had already stolen components from. One of the dangers of buying bulk lots is you start to end up with a *lot* of clutter.