Based on the latest market prices tracked on TCG Stacked, Sauron, Lord of the Rings is worth about $2.78 USD for a regular copy and $3.26 USD for a foil copy
Yes, you need a deck that can reliably provide evasive creatures to enchant, and that creature is probably going to die within the next 3 turns or so, and by enchanting it you're adding extra incentive for your opponents to kill it, but all those risks are worth the payoff of drawing more than 1 card for just 1 mana
First of all, theres a slot that will normally be a common, but 1-in-8 boosters will replace this common with a card from The List, which can be of any rarity
// 03 Your rights ACL always Nothing here reduces your rights under Australian Consumer Law
This particular card is from the second round of Duelist League events, held back in 2011