Ric-migration

I recently bought a Tales to Astonish #1 on ebay for a lot of money. After reading this forum, I am convinced the comicbook was CHOPPED on the right edge, perhaps at least trimmed top and bottom, but definately chopped on the right. I wonder what pct. of guide a book is devalued when this happens. POV, can you share your awesome insight? I knew the book was too nice to be true, now I shall find out if the dealer will give me my $ back. ALSO, what pct. of guide is a book lessened when it has had color touch? I collect pre-hero atlas horror. Any comments are greatly appreciated in advance. I used a regular white lightbulb on a regular lamp to find color touches on a few books, the reflection shows the different ink sometimes. If anyone can provide a link to the best blacklight on the market, perhaps at least a good one, that would be nice. I would want this to find color touching. I have a blocklight bulb, but it doesn't help much at all, anyone have a suggestion why a blacklight bulb I bought at the store isn't much help at least to my untrained eye, or should it be mor obvious?? thanks, people - Ric ps. I answer any emails too, thank you.