In addition to looking at grading cost on PCGS and NGC you could look at
ebay sold listings to see what the graded ones are selling for to help decide if they're worth grading. Sometimes the privy coins go down in value after the hype is over especially with high mintage.
The grade makes a big difference on their value, grade is important. If your coins have scratches, dents etc they will grade lower making them less valuable to collectors.
Edited by livingwater
Today 1H 57M ago