I have been collecting Creepy for twenty five years and here is a quick breakdown on some of the issues mentioned above:
#2 Hard to find in high grade due to black cover, top graded is only a 9.4. But not overly hard to find.
#9 Not a very hard book to find at all. There are already 34 graded and eleven copies have been graded at 9.4.
#13 Not mentioned but a very scarce issue. Only three graded in the census. Rarely ever comes to market.
#19 Same as number thirteen, extremely hard and rarely comes to market. Three graded at this time.
#29 Tough to find. Definitely not the scarcest. There have been eight graded, but this book does not come to market very often.
#32 Overstreet hypes this book as extremely limited. However, there are 21 copies graded and a few very high grade. This book always commands high prices.
#38 Pretty tough, only seven copies graded.
#41 Semi tough to find. Commands high prices, but there are 2 9.8's, 4 9.6's and 3 9.4's out there.
#146 Very tough to find period. Harris edition and rarely comes to market. 1 9.4, 1 9.0 and 2 8.5. Seven copies total have been graded.
I hope this helps out a little bit. Good luck collecting. It seems that there is a bit of momentum in the market these days for Warren Magazines, especially Vampirella and Creepy.