Cheap eBay tumblers any good?

So I like reporting or at least clean the razors that I but from the bay and I have gotten kind of good at it, but I want to reduce the labor so first I was thinking of a bench grinder that runs around 1100rpm and I found one for about $260. The second option would be a tumbler, and there are some on eBay for about $70 and it seems that they could accommodate a straight razor. Probably the grinder would be a better value if I restored like 10-20 razors a month, but I only do 1 or 5 at most when I do. The grinder might be faster, but the tumbler should be safer right? If both of them do the job then I would most likely choose the tumbler.

Get one from a reloading supply place like Shop Shooting Supplies | Reloading | Gunsmithing | Hunting gear — MidwayUSA. I have a lyman and it's served me for many years, but any from a reloading place would work fine.

how good does a tumbler work on pitting?

Check out the SRP Wiki on restoring with a tumbler.

i already did, but the razor on those pictures appears free of pitting.

They will clean up pitting pretty well, but it will still be pitted...just cleaned out & shiny pits. About the only way to get out pits is to remove the steel to the depth of the pits.