So my situation is much like yours. Didn't need the Bronco and already have too many vehicles, but took delivery of my first day reservation on 7/20.
I love my Bronco, but listened to my brother, who has a history of giving bad advice (and I have a history of listening to his bad advice) LOL
Last week I listed my BB, with 1300 miles, on one of the large auto selling sites for $20k over MSRP. Two days later a gentleman called and was very serious about buying it for listed price...no negotiation, no question, was going to fly in to my area, pay me, and drive it home!
I was shocked and amazed. I caught a lot of grief from family members who couldn't believe I would even consider selling it.....I mean I've been waiting for 5 or 6 years since the prototype sketches were released and it was announced that Ford was bringing Bronco back.
I felt like an ass, but ended up backing out of the deal. Who in their right mind backs out of a $15k-$20k profit for really not doing much? I ended up catching grief from others for not taking the deal.
My advice to you is this: Take delivery and at least drive your Bronco a few days. I'll bet you end up NOT selling it. I realize everybody's situation is different, but sometimes money isn't everything. This Bronco is pretty awesome and worth the wait!