Pure breed male brindle boxer (Manchester)

We have a 4 year old male brindle boxer we need to rehome he is a great dog he sits and loves car rides he is not neutered he is house and kennel trained he does still need a little work on the leash as he pulls a little he is great with kids and other dogs once he warms up to them which usually is pretty quick we have all his paperwork including family history going back a ways all his vet papers since birth and papers for him to be akc if you choose to. It is very hard for us to do this but I have had alot of health issues lately and he is just to big for me at this point so we feel it is better for him to be with a loving family how can give him the attention he deserves. We are requiring a fee of 450 firm for his rehomeing you can email or text me my number is 5 six 3 8two two 04 nine one please only serious inquiries Thank you for looking