All scores below updated on 1/5/21. I did not change TMNT #1 as the scores are accurate. The sales prices are actually all over the map for different grades.
Teenage Mutant Ninja Turtles (Volume 1)
#1 first print - the score is wayyy too high - yes it is the $$$ holy grail of the set but simply spending 10k dollars on a 9.0 shouldn't put you ahead of collectors that have spent ages building their sets
this should be 10000 for a 9.8 5000 for a 9.6 3000 for a 9.4 and then downward from there (adjust 2nd and 3rd and 4th and 5th prints to align to the new standard)
#3,4,5,6,7,18,32 2nd print(s) (and #2 3rd print) - these are rarer and more sought after than the first prints - scores should be significantly higher - in order of rarity and difficulty to obtain #32,#6,#4,#5,#18,#7,#3,#2
#11 and #14 - very hard to find issues - scores need a mild bump
#13 impossible - this is the grail of the back issues - I honestly would put this score at 1k++
#16 second only to #13 in rarity and extremely hard to find ( only 2 9.8 exist)
#17 and #28 very rare with #28 being rarer
Raphael #1 this book is exploding right now - I would give it a bump
rest of set looks good with the exception of Raphael 2nd print (needs a score bump as well!)