This site has the actual amounts paid for miles bought ny them:
http://pages.sbcglobal.net/gpirkle/index.htm
Mileage
Sellers
earn
Brokerage Fees
per ticket*
Buyers
pay
25,000
$450
$170
$620
30,000
$540
$180
$720
35,000
$630
$190
$820
40,000
$720
$275
$995
45,000
$810
$285
$1095
50,000
$900
$300
$1200
55,000
$990
$310
$1300
60,000
$1080
$335
$1415
65,000
$1170
$345
$1515
70,000
$1260
$400
$1660
75,000
$1350
$450
$1800
80,000
$1440
$595
$2035
85,000
$1530
$610
$2140
90,000
$1620
$695
$2315
95,000
$1710
$710
$2420
100,000
$1800
$795
$2595
105,000
$1890
$795
$2695
110,000
$1980
$795
$2775
Brokers Fee of $895 per ticket over 110,000 miles