Hmmm… I got into CGC for a while. I CGC’ed all of the ‘Wolverine: Origin’ books as soon as they came out. It was pretty expensive to do the grading and I ended up getting grades ranging from 9.6 to 9.2. I never even took them out of the bag, lol. I sold them on eBay and only got back about 50% more than what I spent on the comics and grading combined. Then again, that was only a few months after the series was released. Things could be different now since it’s no longer being printed (I think).
These days most new comics are not as collectible as they used to be. In case you didn’t know, there was a comic book bubble that burst about a decade ago due to people buying tons of copies of easily available comic books. Sure there are variant covers and alternate editions, but the resale market is much smaller for newer comics, even down the line. You have to consider factors like the grading score, rarity and availability, writer and artist combination, character popularity, etc. etc… Unless you have something that’s rare and in decent quality, then you may not make a lot of money. Do some research on the market and scoring procedures. See if it’s cheaper for you to just buy them CGC’ed or to send them in for grading yourself. You also have to put yourself in the buyer’s mindset. The majority of people interested in ‘All-Star Superman’ probably just want to read it and will pick up the graphic novel. The collectors exist, but there is only so much that they are willing to spend. And on top of that, they probably already have the originals and may only be interested in the variants.
The only reason that I can see in CGC’ing comics these days is as a form of appreciation and display–like a painting.
Hope that helped!