Originally Posted by
andover
Yep, really costs a lot for putting that seat back into the "bucket."

How much is a nano second in 'puter time?

Within each cabin, there are various fares on offer, each with different degrees of flexibility and with different restrictions.
If you want a fully-refundable fare (and, as you have seen, not all refundable fares are fully refundable), then you should buy a ticket with fewer restrictions. This, however, will cost more than the ticket you are currently considering - perhaps even more than $300 more!