I received the t-shirt shaped notepad from AGPC as a gift this past winter, and it's really cute! I don't know how much it costs, obviously, but I love notepads, so I'm very glad to have it.
It is in the shape of the classic black AGP souvenir t-shirt, the one with "American Girl Place" across the front with the shooting star next to the A. It's about 4 inches high if you count from the bottom-most point to the top-most point, but less than that otherwise.
The inside pages are white and unlined, but there is a grey printed "American Girl" across them, right where the logo would be on the cover or actual t-shirt. Very cute!
I wouldn't pay more than $8 for this, considering it's a souvenir and souvenirs run expensive. On eBay, I wouldn't pay more than $4.
For a cute little souvenir: B+ -- It's not an A because the cover was difficult to flip open at first and the pages are attached in such a way that they'll fall out easily once you start removing them. Also, the grey print on the pages isn't very great for writing notes or anything, yanno? But still, it's cute and a neat little souvenir, and it's USEFUL, so it's totally worthwhile.