That is a tough spot to be in.
I would make sure whomever you sell him too knows the neediness and has the time/lifestyle needed to take care of him right.
I gave my dog (A Lab/Golden/Brittney mix) away 6-years ago as my job & thus lifestyle changed as I was out of town 4-5 days a week.
She was a good Hunter and needed to run and play/work. My wife did not have the time (Got let out morning and evening for an hour or so and then back to the kennel. Broke my heart to see her locked up all the time) and my last kid (stepson) was too involved in video games, new drivers license and friends to be involved in playing with her.
I found a family with 2-boys 12 & 14 years old that both were outdoors sports oriented and both had gun training. Spoke with them a few times and met twice before deciding as they had the energy and enthusiasm to make a good home for her.
Saw them once a few months later and she was as happy as could be.
Good Luck.