I have yet to frame an artist's proof I got from Jerry Vanderstelt's ebay shop of Yoda "Luminous Being" It is on giclee paper (17" x 22") and hand numbered and signed (24/30) although I see other sales online of the same thing all over the place. Why number them if there will be more than that number of proofs?
I'm not really familiar with art/prints/posters/proofs, but here's an FAQ on the subject that might shed some light. I hope that helps.