If you're looking to sell them, I would suggest leaving them in the magazine. That gives your customer the option to keep them intact or remove them. If you remove them, you eliminate potential customers who wanted it to remain in the magazine.
If you're keeping them for your own collection, then it depends on how you wish to display/store them. If you want t osee juts the cards and not the magazine, well, I think you see where I'm going - get them how they suit you best.
-- Dan --
Note: Please see my profile for more info regarding trading (section updated 3/4/2024). I have added a large portion of my inventory to the site, and currently have trading turned on (details are in my profile).