Is it worth grading Blastoise #37 from Expedition Base Set?

It depends on condition and market pricing. Current PSA 10 gem rate is 29.1% (based on 729 graded copies). PSA 10 sales average $1092.57 versus a raw market of $82.88. Use the calculator on this page to compute exact EV for your card's condition.

What is the PSA 10 gem rate for Blastoise #37?

29.1% (based on 729 graded copies)

What does PSA grading cost?

PSA service levels range from $59.99 per card (Standard, 90-100 business days) to $9,999+ (Premium 10, for cards worth $250,001+). If a graded card is worth more than its tier's Max Insured Value, PSA upgrades it to the tier that covers it and bills the difference.

Should You Grade Blastoise #37 (Expedition Base Set)? PSA Grading EV

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Should You Grade Blastoise?

Expedition Base Set · #37 · Rare

Default-tier verdict

Grade It+$297 (+172% ROI)

Based on raw market $82.88, PSA 10 $1092.57, gem rate 29.1% (729 graded). Adjust inputs below for your card's exact condition.

Blastoise

Expedition Base Set · #37 · Rare

Market: $82.88

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PSA Pop · 729 graded

PSA 10

29.1%

PSA 9

31.6%

PSA 8

20.0%

PSA 7

7.1%

Your Costs

Raw card cost

Grading tier

Shipping estimate + Other fees

Expected Sale Prices

PSA 10

PSA 9

PSA 8

PSA 7

Card Condition

Centering

Edges & Corners

Surface

Fine-tune your gem-rate odds based on centering, edges, and surface condition.

Expected Value

⚠If graded PSA 10, PSA will upcharge to Priority ($80) — your PSA 10 value of $1093 exceeds this tier's $1,000 cap. No upcharge on PSA 9.

PSA 10: 29.1% × $1092.57+$317.73

PSA 9: 31.6% × $341.53+$107.75

PSA 8: 20.0% × $139.95+$28.03

PSA 7: 7.1% × $88.78+$6.33

Below 7: 12.2% × raw+$10.12

Raw card cost-$82.88

Standard grading (weighted avg)-$65.81

Shipping + Other Fees-$10.00

EV+$311.28(+196% ROI)

Grade It

196% ROI — strong margin absorbs selling fees and price swings.

Want to track this card's price and grading data?

Grade It

196% ROI — strong margin absorbs selling fees and price swings.

About this calculator

This page computes the expected value (EV) of submitting Blastoise #37 to PSA for grading. EV factors in real PSA population data (gem rates), live market prices for raw and graded copies, and PSA's tiered fee structure including upcharges when a card's graded value exceeds the tier's Max Insured Value. Adjust the inputs to match your card's exact condition for a personalized recommendation.

PSA population summary

Grade	Population	Rate
PSA 10	212	29.1%
PSA 9	230	31.6%
PSA 8	146	20.0%
PSA 7	52	7.1%

Should You Grade Blastoise #37 from Expedition Base Set?

Blastoise

Your Costs

Expected Sale Prices

Card Condition

Expected Value

About this calculator

PSA population summary

Blastoise

Your Costs

Expected Sale Prices

Card Condition

Expected Value