Even if it takes 12 servers with 1 gigabit ports, and they are added one at a time once per month: $700 for the first month $1,400 for the second month $2,100 for the third month $2,800 for the fourth month $3,500 for the fifth month $4,200 for the sixth month $4,900 for the seventh month $5,600 for the eighth month $6,300 for the ninth month $7,000 for the tenth month $7,700 for the eleventh month $8,400 for the twelfth month $54,600 to obtain an adequate amount of servers / bandwidth then + $8,400 * 2 to maintain it for two months (which wouldn't be required as many would be deanonymized up to this point) = $71,400 and 14 months. That does make it a lot more unrealistic for me, although in my *ahem* glory days I did have $50,000 in cash once . On the other hand I know big vendors who have stacks of hundred thousand dollars sitting on their kitchen tables. I don't feel comfortable using a network that they can defeat with traffic analysis in a year.