An acquaintance came over to have me drill and tap a hole on his lock plate for him. While I was looking for some tools to do this, I came across a 50 cal smooth bore barrel for one of those Italian Hawken repros. This barrel fits his gun perfectly. I can't for the life of me remember where or when I got it or for that matter, how much I paid for it. It does appear unfired. Fella wants to buy it. Whats a fair price?