Checked in at T-23, flight was F1 Y-9, no offer for bump.

Printed boarding pass at kiosk, flight was F0Y-10, offered a bump. Asked for $500, when I got to the gate the GA said the current offer was $600 and they'd need me. They raised the offer to $700 when they had 5 volunteers and needed some more.

The redcoat who ended up handling some of us (I was going MSP-LGA and needed to go to LGA, others got rebooked to JFK) said there was no $700 amount, the offers went from $600 to $800. But we got $700 anyway.

Choice this time was virtual Visa card (usable online only) or Delta e-gift certificate.