Amgen's ($AMGN) manufacturing and R&D sites in Colorado are officially on the block, and the company is hoping another drugmaker will be interested in buying them. But they will not come cheap. According to the Daily Camera, Greenwood Village-based Binswanger has the 70-acre Longmont site on the market for $85 million. The 692,000-square-foot property has 6 buildings that include a manufacturing facility, along with some labs, a warehouse and a utilities plan. A 159-acre site nearby is on the market for $9 million. The closure was part of Amgen's two-step, 4,000 job ax-wielding that fell heavily on manufacturing. About 430 people were laid off in Colorado. Story | More and even more