Habitation service cost !

I know i was a bit dim not getting a quote first !but i had spoken to a n other dealer before to get an idea of Hab service cost for a Bailey M/H and was told £165.00 i thought a bit steep as there is not a lot to do other than Gas /Elecricity and water checks No Brakes or anything else, But said to myself ok fair enough,small price to pay to keep warranty in line. Went back to supplying dealer for first Hab service  wait for this ......£285.00  a whoping £120 more  Just goes to show shop around or pay a hefty price,needles to say Lowdhams WILL NOT get any more of my hard earned !