1. As i've mentioned before, i hate it when green Hulk is colored to look like grey Hulk. There's more to what made the grey Hulk cool than just having grey skin!

2. There are nearly as many comics with "special prices" as there are regular titles.

3. I am surprised that X-Men Classics was more than a regular title. It was just a reprint book, like Marvel Tales, and didn't even have the back-up feature at this point.

Was it on special paper?

No, they were regular format comics.

Did What If? have a higher page count, or maybe a smaller ad count initially?
I did feel like there was something which justified the price difference, at least at first.

I think Bob was asking about X-Men Classic specifically. But it is true that What If? had a higher page count.

Oh yeah, i was just speaking on your Point 2.