They look good to me, maybe some aggressive cleaning attempts and possibly an applied green patina, usually see this with "sand patina" but it looks a little off to me.
The dealer is not on the NFSL, but that means only so much since bad dealers have a tendency to change IDs often enough. However, looking through the wears, I don't see anything that bothers me about the patinas. Several have what looks like mineral deposits which I would think to be hard to fake.
It's hard to say for sure without seeing them in-hand but I've seen a very similar(in color) patina on uncleaned coins that I purchased and a cleaning expert described it as malachite if I recall. It is not active corrosion or anything but I could not easily remove it from the coins I found that had it. If you like the look of it though, go for it. I don't think this guy is a bad seller.
I can see what I believe to be Bronze disease on several of them. Depending on how they have been 'stored' it may be in the process of spreading further. If I was to buy any of these coins I would keep it/them separate from my other coins and be on the 'watch' for an outbreak, for several years after purchase.
The follii look like they might have come from the same hoard and also the Pilate prutot. Most of the coins offered are probably middle-eastern finds and all of them seem genuine.
I think the OP folles are genuine and without bronze disease. (There are two "Samaria obols" with disease.) Not all green cover eats into the surface like bronze disease. I think those folles have what is called "verdigris". I have coins like that that have been stable for thirty years (albeit in a dry climate).
