it is a level 6 machine type monster with 800 atk and 2800 def. worth about 10 - 15 $ super rare holo on www.yugioh-cards.net and for ultimate rare is 19.99$ and for just a rare one is probably under...
The old unplayable ones can be worth anything from £20($40) to £40($80), depending on condition and exact edition, some collectors will want them. The playable Obelisk is not worth that much, as it...
Check eBay, but only the completed listings, not Buy it Nows. This means you will be seeing the prices that people are actually paying for those cards, and not the prices that sellers want people to...