Removing (and replacing) emblems

[Atmosphere]

I've seen this asked a few times but I've yet to find a straight answer: is it possible to replace emblems if you were to sell the car back to a dealership?

I've been told it reduces the value of the car, and if so I would be a little reluctant to do so unless I had a way to replace them later. I know I can buy some 3M double-sided tape, but I doubt I could get the emblems back where they're supposed to be. Any tips or suggestions regarding this? Pictures of removed emblems are more than welcome as well, so far I've only found one car without them.