Rehoming 10 weeks old beagle puppy

I have one female beagle puppy recently adopted which is 10 weeks old. It's not going to be a good perfect match after a week in an apartment with a young child, and she needs a new home. We bought her for $600 and I'm willing to let her go for a $500 re-homing fee, which includes all the new items we've bought for her (crate, food, toys, etc.).