Cheapest priced copy (Ice Age): $0.35 at Card Kingdom, near mint, their price list as of .
Forgotten Lore 
Sorcery · Uncommon · Ice Age · #237
Target opponent chooses a card in your graveyard. You may pay {G}. If you do, repeat this process except that opponent can't choose a card already chosen for Forgotten Lore. Then put the last chosen card into your hand.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
1 printing · $0.35 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Ice Age | 237 | Uncommon | $0.35 | — |
2 rulings from Wizards of the Coast
- 1 October 2008The spell has no knowledge of cards chosen for other spells named Forgotten Lore.
- 1 October 2008You target an opponent when you cast Forgotten Lore. The opponent chooses a card in your graveyard as Forgotten Lore resolves. After that choice is made, you’re given the option to pay {G}. If you do, the targeted opponent must choose a different card, if there is one. (If there isn’t one, this part is skipped.) Then you’re given the option to pay {G} again. As long as you keep paying {G}, the process continues. As soon as you decline to pay {G}, the last card that was chosen by the opponent is put into your hand.