German shepherd/Great Pyrenees 8week old pup

Just got this pup on Dec 7 8 weeks old born Oct 13 very healthy first set of shots were done the same day I got him unfortunately I had no idea my 18 month old is allergic. asking for $500 obo I’ll give you everything I have for him for free his toys, crate, food and his shots certificate collar and leash please need gone asap