On this one site I have I'm getting around 100,000 pageviews per month, what is reasonable to expect from adsense?
I get 100k per day, so you can probably expect $200 per month. But I have a somewhat low CTR/CPM though - 1%-1.5$/$1.8-$2.5 If you can do better, you will make more. And that will depend on your ad placement and niche.
It all depends on your niche, and your CTR + eCPM how much you'll make. I'll say between $200 to $1,000 a month.
On low CPC niches you can get $20-$200 (so I guess that is your bottomline) but it all depends as other said on other factors
100,000 pageviews from which type of traffic? If it comes from search engine, I guess you should make good money from it. But, if it comes from traffic exchange, do not expect a good result from it.
How much are you getting from adsense for the 100k pvs you have? That should tell you how much to expect...