Though NA 24 is my favorite, NA 25, 26, 27, and 28 are indeed rarer.
How rare is NA 13 in comparison since it is designated as Rare by Overstreet and is also given a SI rating of 10 by Gerber in his Photojournal?
No doubt those watery theme adventure covers are just so much better such as NA 25, 27, 30, 31, etc.
Honestly NA 13 is probably still rarer. NA 25-27 are so much more desirable though that they come to market much less often.
I have seen 3 NA 13's for sale over the last 5 years, and only two each of 25-27. Most of those were low grade or restored. Just my
NA 15 is the other extremely tough issue. In fact, it has fewer copies on the census than 13, 25 and 27:
I'm actively looking to buy copies of New Adventure 15 & 25 if anyone knows of any for sale. Evident by the condition of the 37 I recently posted, I'm open to just about any grade & restoration is never a problem for me, so long as it's disclosed up front