Most Soviet and Russian rockets are/were launched from an inland site, and spent booster stages crash on the ground in sparsely populated (and frequently impoverished) rural areas.
Since the fall of the Soviet Union (and the appearance of an open market for scrap metal, and the erosion of the Soviet state's various policies on recovering anything that could reveal secrets to the West and on hounding anybody who operated businesses outside of Communism), these spent boosters have been dismantled and sold for scrap by shipbreakers who live in the area.
There are a number of articles about these people (often discussing a variety of matters such as the poverty of the area, the trend of shipbreaking providing a side-job for farmers, the use of scrap metal from rockets in raw form for farm tools and buildings, and the environmental and health hazard from the toxic hypergols used in Russian launch vehicles).
What I have not seen is an analysis of the economics of Russian launcher debris shipbreaking -- how much are these people making? How much money is falling from the sky? What are their expenses? Do they sell anything other than scrap metal?