Originally Posted by
Kacee
OP is talking about a W fare and upgrading to business class on SFO-NRT. That's a $550 co-pay plus 30k miles. Conservatively valuing miles at 1.5 cpm, that's $1000. The cash value of a GPU is around $400 (just check ebay).
Not quite. The OP was asking about using miles (no co-pay) to upgrade to PP, then monitoring for PZ space and switching to use the GPU if PZ opened. The rationale was that using a GPU to go to PP was a waste, but OP was willing to use the miles for PP.
So, while the GPU might still be less valuable than the miles, it’s not as much of a slam dunk.