Onix

Onix (71/100), the Common from Sandstorm, has an estimated ungraded market price of about $0.95. Note: 25 other cards named Onix exist across the sets Riffle tracks, at very different values; check the collector number.

This page covers Onix (71/100), the Common (about $0.80–$1) from Sandstorm.

The other versions: #3/18 from Southern Islands (Common, about $48–$65); #98/147 from Aquapolis (Common, about $7–$9); #42/112 from FireRed & LeafGreen (Uncommon, about $2–$4); #69/111 from Neo Genesis (Common, about about $1); #84/130 from Base Set 2 (Common, about $0.90–$1); #69/109 from Team Rocket Returns (Common, about $0.80–$1); #56/102 from Base Set (Common, about $0.80–$1); #65/115 from Unseen Forces (Common, about $0.70–$1); #61/116 from Plasma Freeze (Uncommon, about under $1); #84/110 from Legendary Collection (Common, about under $1); #56/95 from Unleashed (Common, about under $1); #69/100 from Stormfront (Common, about under $1); #109/214 from Lost Thunder (Common, about under $1); #92/130 from Diamond & Pearl (Common, about under $1); #57/95 from Unleashed (Common, about under $1); #71/168 from Celestial Storm (Common, about under $1); #103/236 from Unified Minds (Common, about under $1); #105/236 from Cosmic Eclipse (Common, about under $1); #095/165 from 151 (Uncommon, about under $1); #61/108 from Evolutions (Common, about under $1); #138/264 from Fusion Strike (Common, about under $1); #036/78 from Pokémon GO (Common, about under $1); #68/163 from Battle Styles (Common, about under $1); #070/132 from Mega Evolution (Common, about under $1); #090/182 from Paradox Rift (Common, 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 4% PSA 10 gem rate and current graded prices, grading a near-mint Onix (71/100) 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.

Onix (71/100) is a Common. PSA has graded 90 copies to date, so graded supply is measurable and growing.

Of the 90 copies PSA has graded, 4% 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.