The more valuable the coin is, the more it costs to have it graded. ... It is a much better value to get expensive coins graded than it is to get common coins graded. That is why you see most coins worth over $5,000 in grading holders and why you don't see a lot of low value graded coins.

Is it worth having coins graded?

In nearly all situations, key date coins in uncirculated condition are worth having professionally graded; especially if you have multiple coins to submit. This will help to reduce the price that you pay per coin, when factoring in shipping and insurance expenses.

How much does grading a coin increase its value?

Note that grading a coin doesn't automatically increase its value. However, if you have a coin with an MS 69 or 70 grading, it will be easier for you to sell the coin at the highest possible price.