Gengar

Gengar (5/92), the Rare from Legend Maker, has an estimated ungraded market price of about $210–$280. Note: 23 other cards named Gengar exist across the sets Riffle tracks, at very different values; check the collector number.

This page covers Gengar (5/92), the Rare (about $210–$280) from Legend Maker.

The other versions: #11/110 from Legendary Collection (Rare, about $1,400–$1,800); #13/165 from Expedition Base Set (Rare, about $700–$900); #10/144 from Skyridge (Rare, about $430–$560); #94/102 from Triumphant (Rare PRIME, about $430–$560); #5/62 from Fossil (Rare, about $270–$360); #27/130 from Diamond & Pearl (Rare, about $175–$230); #48/165 from Expedition Base Set (Rare, about $160–$210); #16/99 from Arceus (Rare, about $160–$210); #H09/144 from Skyridge (Rare, about $135–$180); #18/100 from Stormfront (Rare, about $105–$135); #17/99 from Arceus (Rare, about $95–$125); #20/62 from Fossil (Rare, about $75–$105); #70/214 from Unbroken Bonds (Rare, about $42–$55); #35/83 from Generations (Rare, about $41–$55); #60/162 from BREAKthrough (Rare, about $38–$50); #TG06/30 from Lost Origin Trainer Gallery (Rare, about $34–$44); #38/111 from Crimson Invasion (Rare, about $20–$27); #85/202 from Sword & Shield (Holo Rare, about $12–$16); #094/165 from 151 (Rare, about $7–$10); #066/196 from Lost Origin (Holo Rare, about $4–$6); #57/198 from Chilling Reign (Holo Rare, about $3–$5); #057/91 from Paldean Fates (Uncommon, about $1–$2); #050/88 from Perfect Order (Rare, about under $1).

The collector number printed at the bottom of the card is the reliable way to tell them apart.