Make official price for tipping

[peterpal]

I'm freshly 50 and generally never ask for a port and still run everywhere and take the boat.
When I died at 46 I paid 200p for a res because that was like 20% exp loss after the hell level and my resser had to get a port.
The price of a port should be an exponential increase though. 20p for a level 20 is a lot more than 50p for a level 50.