Rather than selling it to gold4rs for 40$, why not sell on sythe for 60-80$. You do not need to wait that long. You can get pretty decent offers on sythe rather than crappy offers from gold4rs. Plus, it's more safer selling on sythe. You do not have to go first, you can just use a trusted MM or an OMM.
In conclusion, I don't recommend selling to gold4rs. There have been reports that they scam. But majority say they are safe.
USE SYTHE, number one blackmarket for gaming