I would keep them, I have been in the exact same shoes as this, maybe not to the extent of 100$ sculptors cut but yeah.
Needless to say, unless you still contact them often, know they are major collectors etc, it really isn't worth the trouble. Most likely they forgot or long since cared and on the flip side can you think of any games you may have left at others houses back in the day.
Growing up in the burbs like I did, we brought games/controllers to everyones house, when they eventually got put away for years it just happened. I couldnt tell you where half these dudes live anymore lol