Is it worth grading Sylveon ex - 156/131?

SV: Prismatic Evolutions · 156/131

Yes — if it grades 10. A 9 loses money at current prices. You need the 10. 9s are pooled across graders here — PriceCharting has no PSA-9-only figure.
RAW NOW$509.52TCGplayer market
PSA 10 SOLD$1531.2720 completed sales
Grade 9 SOLD$468.0022 completed sales · mixed graders
IF IT GRADES 10+$997after $25 fee

A raw Sylveon ex - 156/131 from SV: Prismatic Evolutions currently sells for about $509.52. Across 20 completed eBay sales, a PSA 10 has a median price of $1531.27. After a $25 grading fee, a 10 would net roughly $996.75. But a Grade 9 (mixed graders) has a median of $468.00 across 22 sales — which works out to −$66.52 after fees. A 9 loses money at current prices. You need the 10. 9s are pooled across graders here — PriceCharting has no PSA-9-only figure.

Every grade, with the sales behind it

GRADEMEDIANSALES ON RECORD
PSA10$1531.2720 sales
CGC10P$1750.494 sales
CGC10$700.0011 sales
BGS10$3450.003 sales
TAG10$1612.508 sales
ACE10$741.958 sales
GRADE9.5$749.5010 sales
GRADE9$468.0022 sales
GRADE8$400.0014 sales
GRADE7$315.616 sales

Now find a raw one to buy

Knowing a card is worth grading is the easy half. PokeSnipez watches eBay around the clock and flags raw copies of this card closing below market — so you can actually make the trade, not just read about it.

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Every figure on this page is an observed number. Raw prices come from TCGplayer; graded medians are completed eBay sales, shown with the sale count behind each one. We don't estimate, model, or fill in gaps — if a grade has no sales on record, it isn't listed. Grading outcomes are not guaranteed: most raw cards do not come back a 10, which is exactly why the 9-grade number is on this page. Where PriceCharting has no PSA-9-only figure we show its pooled 9 — PSA, BGS, CGC and SGC together — and label it as such rather than call it a PSA 9.