As much as it costs to build a flying object that flies either high enough or fast enoughed that they cannot be identified.
The average UFO has no weight. The average UFO is a digital image or an image on film.
A Helios Ray costs 1 pass under black market. It may also come up as a UFO.
How much a UFO would weigh if they do indeed exist is not known.
A UFO is an unidentified flying object.By definition it is unidentified and therefore we don't know what they are or where they come from.If we don't know what it is or where it comes from it can't be valued.
NONE
yes but not much, for example UFO
a UFO See http://grammar.ccc.commnet.edu/grammar/abbreviations.htm (all the way to the bottom) for help determining when to use a or an before an abbreviation.
Ufo's do exist because a Ufo is a thing in the sky that you can not explain.
They usually see UFO's at a UFO sighting
movies that have UFO's in them i guess
It is unknown what is inside of a UFO.
The 'F' in UFO stands for "Flying". UFO is an acronym for Unidentified Flying Object.