Thanks for the quick response :) And thanks for letting me know, i just wanted to check before bidding because i couldn't tell if it was from the camera or if it was on the shirt.
It turns out that the pits are stained. I thought it was just the lighting because it was in quite a yellow room but after taking it outside, I could see that there was a slight color to the pits. I will add this to the description. I'm sorry if this discourages your bidding!
You CANNOT bleach pit stains, it will make it a horrifyingly dark dark dark color that you will never be able to hide! The best way to remove sweat stains is by mixing baking soda and water and rub it in and let it sit. It might take a couple times, but it will work :) trust me, I sell second hand clothing so I'm speaking from experience lol