[VoiceOps] what is a fair port out fee?

Im trying to negotiate a new orig carrier onboard and they have a 10 dollar port out fee. This would be a pretty staggering figure if I had to port out my TN's due to quality or similar issues. I'm not naming names, thats not cool but at the same time before I sign anything it looks like I'm seeing a lot of 1 - 3 dollar port out fees on websites I really want to get this number pushed down but don't want to be unreasonable, I just can't sign something where a port out fee is that high. Whats the norm out there?