So how do you determine how much to charge? I went by a listing that I saw for 4 pairs and they started at 500, I have 10 pairs so I started them at 1000. There are 3 pairs listed right now that has a 2000 GIN so to me it does not seem that far off to ask 5000 for 10 pairs. At Walmart it is $10.00 for 5 pairs. I think I am good but thanks.