10 gauges are just not as common as they used to be. i rarely see them for sale like i did many years ago.
but still a nice score from your friend and a danged nice gesture on his part. enjoy her!
I haven't seen a 10 guage but have seen a 8 gauge in a pawn shop once. It was a bolt action and had a long battel on it. This was 20 years ago and the shells back then were $20 a box.