While the Turtles are not the big business they were back in the 1990s, there are still enough media crossovers to attract attention to the original (and hard to find) Mirage books, including the 2014 movie reboot and a sequel to come later this year.
1st prints of TMNT #1 are considered rare. At least, by 1980s standards, with a little under 600 unrestored examples graded in the CGC census.
Very high grade copies may not be rare, exactly, but are extremely expensive. A 9.8 will set you back over $15,000, making it the most valuable comic book of the 1980s by far.
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