If you can rent an STS for $95 per hr, you should have no problem paying the freight...that's a steal. we get $120 for 9650STS's and $130 for 9750's here.
If you are looking at renting a combine go to machinerylink.com this company owns a fleet of sts cats and 2388's. The macine cost is competitive for the service you will recieve. Just my thoughts.
Watch out, all the dealers around here charge a minimum number of hours too. usually 100 hours. 100 hrs x $95_ hr = $9500 = $23.75_ acre and you pay fuel and labor