Kingdra

Kingdra (31/147), the Rare from Burning Shadows, has an estimated ungraded market price of about $0.60. Note: 16 other cards named Kingdra exist across the sets Riffle tracks, at very different values; check the collector number.

This page covers Kingdra (31/147), the Rare (about under $1) from Burning Shadows.

The other versions: #148/147 from Aquapolis (Rare, about $520–$680); #H14/147 from Aquapolis (Holo Rare, about $185–$250); #85/95 from Unleashed (Rare PRIME, about $50–$70); #8/111 from Neo Genesis (Rare, about $20–$26); #19/147 from Aquapolis (Rare, about $15–$20); #7/146 from Legends Awakened (Rare Holo, about $14–$19); #TG03/30 from Astral Radiance Trainer Gallery (Rare, about $10–$13); #108/160 from Primal Clash (Rare, about $10–$13); #19/64 from Neo Revelation (Rare, about $8–$10); #12/109 from Team Rocket Returns (Rare, about $4–$6); #17/95 from Unleashed (Rare, about $4–$6); #84/116 from Plasma Freeze (Rare, about $3–$4); #107/160 from Primal Clash (Rare, about under $1); #33/163 from Battle Styles (Holo Rare, about under $1); #037/196 from Lost Origin (Holo Rare, about under $1); #032/182 from Paradox Rift (Rare, about under $1).

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

It's roughly a wash: with a 18% PSA 10 gem rate and current graded prices, grading a near-mint Kingdra (31/147) is estimated to come out within about $10 of selling it raw (est.); grade for protection or display, not profit.

Assumes ~$25/card bulk-rate grading (standard service costs more); ignores turnaround time, sub-9 grades, and shipping. A screen, not a promise.

Kingdra (31/147) is a Rare. PSA has graded 77 copies to date, so graded supply is measurable and growing.

Of the 77 copies PSA has graded, 18% earned a PSA 10. That's a low gem rate, so flawless copies are genuinely hard to come by. Grade-by-grade population and pop-over-time appear with Riffle premium.