Is this normal? Fair? How could I have avoided it?
I really understand your disappointment and feel some sympathy for you, but I look at both sides for “fairness”.
In the Seller’s interest;
- A sale asap is best
- Cash now is better than cash later
- Cash now is MUCH BETTER than the promise of future payment, which may not happen if the buyer back out
As the buyer, you tried to encumber the seller to hold the item for you “for free” expecting the seller to ignore sooner “for sure” offers for your possible “future payment”. What guarantee does the seller have that the future buyer won’t back out? NONE. If that happens, then the seller is screwed not accepting the first come offers.
Bottom line, you made an arrangement for your benefit at the seller’s expense, crying foul that “they didn’t keep their word” to your one sided bias arrangement.

