how much was a base set booster box in 1999 Pokemon Unlimited WOTC Sealed released in 1999 Booster Pack [1st Edition] Prices

Ive also seen a Hydreigonis he also in the set

For reliable examples, refer to databases like the Pokmon TCG Card Database or PSAs pop report

(Bevy of Beebles) Jace Beleren Jace Reawakened Jace, Arcane Strategist Jace, Architect of Thought Jace, Cunning Castaway Jace, Ingenious Mind-Mage Jace, Memory Adept Jace, Mirror Mage Jace, Telepath Unbound Jace, Unraveler of Secrets Jace, Wielder of Mysteries Jace, the Living Guildpact Jace, the Mind Sculptor Jace, the Perfected Mind Kaito, Cunning Infiltrator Kasmina, Enigmatic Mentor Mordenkainen Mu Yanling Mu Yanling, Celestial Wind Mu Yanling, Sky Dancer Narset, Parter of Veils Oko, Lorwyn Liege Tamiyo, the Moon Sage Teferi, Master of Time Teferi, Temporal Archmage Teferi, Temporal Pilgrim Teferi, Timeless Voyager Tezzeret the Seeker Tezzeret, Artifice Master Tezzeret, Betrayer of Flesh Tezzeret, Cruel Machinist Vronos, Masked Inquisitor Will Kenrith Will, Scholar of Frost

Platforms like Whatnot let you join live streams where sellers auction off cards in real time