So it looks like this experiment has mostly failed for two main reasons.
1) I think there are just way too many used/refurbished laptops out there and although this was a particularly good deal at the price I was trying to sell them at, it was just lost in the sea of listing. I tried local listing as well, no luck... like not even one reply. My ebay listing got 4 views total.
2) Ebay recently changed their listing policy so that normal sellers cannot list things as refurbished anymore, only sellers enrolled in and approved of for the ebay certified refurbished seller program. I did apply to the program, but I haven't heard back yet and I don't want to sit on these laptops while I wait to find out.
But it's not a total loss. I had two orders, one for 4 laptops and one for 2 laptops, all 6 basically identical. I'm only sending back the order of 4 and keeping the other 2. The 2 I am keeping is the order that I was already partially refunded for so that brings the total for these two laptops to about $210 if you include the cost for return shipping on the 4 I am sending back. I'm actually not sure if I will be refunded for the cost of shipping when they were sent to me, so the final total might be $30 or so higher in the end, but still two laptops for $210-$240 isn't bad at all. The partial refund I got was for one having a white spot on the screen and one bad charger so I will probably try to sell that one for $100 or so, whatever I can get for it, and just keep the last one for myself.
What I would have done differently looking back:
I had it in my head that I'd be getting these cheaper if I bought them in bulk but I don't think that was really the case. I probably could have gotten about the same deal ordering one laptop at a time and I should have tried with one or two laptops just to see if it worked at all before jumping in with 6 laptops right away.
I also didn't even look at macs, and I should have. I probably didn't look at them because in the past I have found it pretty hard to find good deals on them with any resale value, but they are much easier to resell when a good deal can be found. I have sold a few macs on ebay before and they sold very easily.
Just a note, I never got as far as doing any repairs on any of them. First I wanted to see if any that didn't need repairs would sell, and they didn't.
So maybe I will try again, maybe with a mac.
And if anyone wants an 8th gen i5 laptop with a small white spot on the screen that is only noticeable when the background is dark for $100 shipped OBO, let me know.