Here is pdf that reports on the status, activity and prices of the commercial space launch industry
Long March 3A, 3B and 4B rocket launches had $50 million prices for the vehicle.
The Long March 3B can get 11.2 tons to LEO A $2030/lb price to LEO.
The Long March 5 will be able to launch 25 tons into LEO.
Proton M rocket price is listed at $70 million.
A Proton M can launch 3 to 3.2 tonnes (6600 to 7050 lbm) into geostationary orbit or 5.5 tonnes (12,100 lbm) into a geostationary transfer orbit. It can place up to 22 tonnes (48,500 lbm) in low Earth orbit with a 51.6-degree inclination.
The price to LEO is $1443/lb.
Proton rockets seem to cost about 70 million per launch
Proton SL-12 is listed at $72.5 million and can launch about 20 tons to LEO.
Soyuz 2 is listed at $40 million
Ariane 5 ECA is listed at a price of $140 million. It can lift 21,000kg to LEO. This is a price of $3,030/lb to LEO.
Here is a chart of prices from 2001 to get to LEO
Information on the Delta IV rocket
Here is a one page pdf that shows that the Delta IV heavy can be expanded to 100 tons to LEO
Here is a discussion of possible SpaceX plans for heavy lifters
Some other rocket musings from the ambivalent engineer blog