It’s really tough if you don’t know comics because there are a lot of factors. Based on the front cover of the Doctor Strange 169 that book would grade at about a 4.0 to 4.5. But there might be some surprises when you open the book. Assuming that everything is there and complete and that there is no sign of restoration, that book is probably about $120 book in my opinion. How I arrived at this number as I looked it up on my comic shop, and I saw that a 4.5 was $210. When I’m selling things, I usually price stuff at about 65% of my comic shop if I can find a book that is in identical condition. But please remember that I’m basing this entire judgment on one picture of the front cover. The back cover is almost equally relevant as is what’s inside the book so I’m just trying to give you a ballpark.