How do I determine the condition of a classic comic book?

Condition is paramount in the comic book market. Key factors include spine condition (creases, tears), cover wear (scratches, fading), interior pages (creases, tears, foxing), and overall cleanliness. Look for descriptions using grading terms like 'Near Mint,' 'Very Fine,' 'Fine,' and 'Good.' A comic graded by a reputable grading company (like CGC or PGX) is more trustworthy.