I take generic cold tablets, loath generic root beer, and have a sealed
original Apple item, that in used but good condition I have sold to members
of this list for $12, on auction with a current bid of about $600 with 3
days left.
If its something you want to use, get one that works well, or even works
the best, generic is fine.
In matters of taste, go for the real thing, Barq's or A&W.
Collectibility has its own rules, but sealed original mint etc. mean money.
The only thing better is history, which is sort of the partner to
uniqueness.
The problem I think we are having is the intersection of collectible items
that some of us wish to use, and where the cost of the replica is close to
the cost of an original. A classic example of this that we can look back on
instead of speculation on the future are the Gordon Gow editions of the
classic Macintosh MC275 tube amplifier. At a time when the original MC275
amps were selling in very good condition for about $1500, MacIntosh
released the Gordon Gow remake at $5000, with the street price dropping to
about $3200 after a year or so. The re-release killed the collectible value
of the originals, as the average person was a USER not a COLLECTOR, and
greatly prefered the new more reliable etc. unit.