Hofmann - I paid $60 for 50#. They were nice plates, but I prefer a decent lip on plates. I will likely be listing my York's soon.
Standard - I paid $10 for 10#. I never cared for these, but took them as part of a deal when I was buying a plyo box set.
Weider - I can't remember what I paid, but it was around $1 to $1.50 per pound back in 2016. I really liked the open handles on these as I would just hook them onto the wall.
$80 represents a loss I can live with. The couple that picked them up were very nice. I am kind of relieved to have fewer plates in the house. It was getting excessive.