I have a full set of Dunlop SP Sport Maxx GT staggered tires. They are brand new and have never been mounted. 255/40ZR19 for the fronts and 285/35ZR19 for the rears.
These fit the E60 M5 and E63/E64 M6.
These are $328/each for the fronts and $345/each for the rears from TireRack, for a total of $1346.00 plus shipping.
I'm asking $1050 + shipping for the full set.
I have a FedEx commercial account and can get better than over-the-counter shipping rates. For reference, the tires would be strapped together in twos. Each pair would weigh 61lbs and measure 26x26x22 inches. My ship-from zip code is 92120.