Eight or 9 dollars per acre. Spent $7900 in 1999 in repairs and improvements to harvest 1150 acres. Only one small breakdown. I was shocked when I got the numbers all added up. Imagine the costs if I'd had some major expenditures like a feeder chain (which I replaced from my stock so no cheque to write). Tom, it takes $650 just to change the oils and filters. a new sickle is whatIJ $300 to 400 - I generally replace the sections for probably $150. Break 4 or 5 guards in a season and there's another $100. I had to replace a header lift cylinder - $500 for a used one. Replaced 2 rear tires @ $600 each. Replaced the impeller paddles, added some helical bars to the cage and changed the discharge paddles on the rotor to the combination paddle_rasp bar style - about $800. Fixed an oil leak on the hydro control valve - $900. And now I find the AHHC controller I ordered in February is still on back order. Nice company support! A grain elevator chain for a 1680 Case is 3 paddle shorter that my R50's sold for $192 while my Gleaner dealer asked me $650! My corn sells at the same price as me neighbour's. They both use the same chain! I AM a grumpy Gleaner owner - the cost reductions I expected have not materialized, available supply of used headers is still as low as for my l2 and the market value as a trade declines at twice the rate of red or green. Yet, I do like the simplicity and the current capacity of the machine. And, I sure don't want to go through this same learning curve with a red combine.