A proper electric standing desk keeps you moving and should easily last five to ten years. If you buy a cheap, single-motor setup, you will end up replacing it in two years when it starts wobbling or stalls under load. Desk makers usually refresh their lineups in late autumn, which makes January the sweet spot for productivity discounts on last year's perfectly good inventory.
Aiming for a dual-motor frame with a solid top puts your budget around $550. Paired with the right financing window, you can set up a workspace that protects your back without draining your savings account in one afternoon.
The 15-month promotional window is a hard finish line, not free money. If you still carry a balance when those 15 months end, the card's standard variable rate applies to the remainder. Set up an automatic monthly payment of $36.67 from day one so the desk is completely paid off before the regular rate starts.