Not sure where you are, but if commercial (especially rural) is anything like residential around here, they'll be lucky to get 10 year ago pricing. Offer them what they paid and go from there. Make sure to get a stage one enviro test on the ground around the tanks (runs 2k +/-) for contamination and make your decisions from there. Shop your fuel delivery supplier if your going to be an independent. The rural spots are great if you are in a farming area. The hired field help flock to those quickie marts and spend a lot of money on munchies etc (not so much on gas though). And if you could have a service bay too, you'd be golden!