Hi Augsix,
I have no practical experience of the watch. I did write a tiny overview of it here -> Schumacher 2002 model
All I can add is that the movement has been used in various other Omega models & I have never read any reports of problems with this movement.
As for collectability.
I don't have a glass ball to read the future, but as with most things, the second hand ( Pre-owned if you like ) value of these has dropped considerabely. I don't know when the value of the watch will rise to above the initial purchase price ( Inflation adjusted of course ! )
Obviously, if you are buying pre-owned, make sure it comes with ALL paperwork , boxes etc etc. This will dramatically effect the collectability value later.
This watch is a chronograph ( has sub dials ) & NOT a chronometer ( Officially tested by an independant body for extreme accuracy ). This does NOT mean it is inaccurate, it just hasn't been tested.
5555 is a "reasonable" number of watches. Not SO rare that you never find one & no-one has heard of them, but not so common that they are everwhere. So this may keep interest alive. Also there is the Schumacher connection. Schumacher fans who normally have no interest in watches, will also enjoy this item. Who knows fathers may buy this watch for their son born in 2002 in the future.
You just don't know what will make a watch become more collectable in the future.
My "advice". I guess you can't find one of these new now. So you're probably looking at pre-owned. If it's nice , complete & the "right" price for you. BUY IT.
Wear it ( carefully ), enjoy it, look after it. And, who knows it may be worth more in the future. If not & you bought wisely, you should at least break even & have had a really cool watch for a few years.
Let us know what you decide.
Steve