Originally Posted by Happy

My guess is 90K.

We know the residual value of the Partial OC certs (all certs are partial now because the portion to miles was gone).

We also know the new TP's certs value - with both the airline and the hotel stay components. (IIRC somewhere there are the separate component value tables).

If Marriott allows upgrade, the calculation would be using the hotel component value of the new certs, compare that to the residual value of the old certs, the difference is your upgrade cost. It is not too hard to figure out. The unfortunate thing is, the new cert value is based on the Peak prices, hence the upgrade cost is much more than the old package which is a flat incremental value.