consider this before slabbing. if the coin grades at VF35 rather than XF40 sales are between $300-350 at XF40 closer to $350. as Earle42 stated you're giving most of the value of the coin to the grading company.
two reasons to slab
1. its a rare coin that needs authenticated and preserved
2. you are planning on selling the coin and the cost of acquisition plus the grading fee's would warrant it without chewing up all your profit
i don't slab coins for these reasons especially the cost involved. I don't know why this is so popular today. just making the grading companies wealthy