Provided it's in some kind of limited edition packaging that makes it clear that it's not just a bunch of parts being sold as a bundle, and if there are truly only 1000 of these packages made... these things ALWAYS appreciate in value, despite what anyone else in this thread thinks.
Now if it's one of those Disgaea 3 deals where all you're getting are a bunch of parts compiled into one shipment as opposed to a single limited edition package... well then it's only worth the sum of it's parts.
Don't compare the HALO 3 helmet edition to something that's only had 1000 made. I saw 1000 HALO 3 helmet editions in a single store, I think