Facebook marketplace strikes again! :)
I kept seeing this set on there for $50 for a while now and finally decided to check to see more details, and turns out it is an inches set from 1/16 to 1/2". There look to be three total missing and I suspect based on the smaller hole sizes there may have been multiple copies of the 1/16" that broke/got lost. The largest half inch has some of the top corners broken off as well. There is some rust in spots..but the edges when touching with a finger seem to have a sharp edge on most of them. The person selling them said they had light usage.
I saw other sets of this size range go from $300 to $1000 on amazon...and so even if only a few end up being good, that is worth the $50.