Typical port donation amount?

[Pipip]

I gave 25p on my 25 ranger and the person said, "wow! Thanks for the generous tip!" In the same night, I asked for a port from ec to gfay on my untwinked level 7 rogue, and a guy private messaged, "I'll port you for 35p." I didn't even respond to him.

I would pay more if someone actually had to come get me, but I tend to just go to rings or the EC tunnel. I don't want people to have to go out of their way, and I expect not to get gouged in the process.