Concrete Block Disposal?

I'm ripping out a retaining wall of about 160 standard concrete blocks and trying to find an inexpensive method to dispose of them. They have mortar on them so construction junction won't take them. I estimate a total weight of around 3 tons so hauling them to McKees rocks transfer station would be a lot of trips and over $300. Any ideas for disposal or recommendations for cheap rolloff dumpster rental?