Hot swap power supplies usually have a gold finger strip that makes the connection to make it considered hot swap. It is usually has solid gold plating on both sides. Id say you can sell the board at high grade board price of $4 per pound. I would do that over trimming off the finger. id say you have a 2 pound high grade board worth around $8, high grade = visible gold

they can be worth a good chunk of money if they work so thats a factor to considder also