ofA nice grade will add value to the card basically, some cards higher than others.
Look at recent sales of particular cards on ebay and most times the same card with a nice grade
will fetch more than a raw card.
I personally love graded and grading cards, except when they come back under 9.5 lol.
Contact Comc as they have 2 grading services and are always extremely helpful.
They have an in house one for like $2 and then the beckett service.
If I purchase a card from the states and have it sent there directly I sometimes get a quick in house check
just for a bit more piece of mind before I send for grading with beckett.
It's roughly a 3-5 day turn around and they will give me a good indication of the cards condition, and last I checked it was like $2.