The median asking price for a used one is $51.97, across 15 live eBay listings for the 2010–2014 generation. Half of them ask between $49.99 and $85.00. That is what sellers are asking, not what buyers paid. Sold prices are not published in a form anyone can measure at scale, and an ask read as a sale runs about a quarter high — so this says which one it is.
The same part comes off any of these, which is worth knowing while you are already in the yard.
That depends on what the yard charges for it and how long it takes to get off the car, and on where it sits against the other 84 parts on a 2012 Subaru Legacy that have a market. The full sheet for this vehicle ranks all of them by what you save and by what you clear.