I was looking to get some Comics graded and encapsulated then came across a local comic shop at a trade fair who had examples of other companies works and demonstrated how easy it would be to snap down the sides and pries the comic out.

To my thinking, you need to ask yourself, How tamper-proof would the encapsulation be, and, what kind of a market is there for that specific comic is there?

There's no point grading a comic if there's dozens of the comic already on the market.