Penfolds Grange 1998

[wineboy]

Can anyone give me an idea of how much a bottle of Grange 1998 will be worth if cellared till peak drinking time which is 2010 to 2040. I'd like to sell it one day but if the value isn't gonna quite much more than what I paid I have no problem opening it up and enjoying. Will be price go up as it gets older?

Also, is a link to the tasting notes for the Grange 1998 if anyone would like to read

http://penfolds.com/library/tasting/grange1998.pdf