I have someone that offered to buy a mini from me last week. We were emailing back and forth almost daily. She gave me an offer, I counter offered 5 days ago. I haven't heard back. In the meantime I have someone else interested. How long do I wait to hear back from the first buyer or do I just sell to the second one and don't wait?I let the second buyer know what was going on. I emailed the first buyer again and asked her decision.