Shai Gilgeous-Alexander 2018 RPA Patch Auto Purple /99 Card Value Guide

Rookie Autographs

By Bob Villemure • Updated November 28, 2025

Quick-Stats Panel

The Shai Gilgeous-Alexander 2018 Rookie Patch Autograph (RPA) Purple /99 is a highly sought-after card, reflecting strong market demand over the past 30–90 days. Recent sales have demonstrated a range of prices, indicating active interest among collectors.

Price Table

Below is a table summarizing the 30-day average sale prices for the Shai Gilgeous-Alexander 2018 RPA Patch Auto Purple /99 across various grades:

Grade	30-Day Average Sale Price
PSA 10	$87,840.00 (cardladder.com)
BGS 9/Auto 10	$40,800.00 (cardladder.com)
BGS 8.5/Auto 10	$39,987.94 (cardladder.com)
Raw	$3,800.00 (sportscardinvestor.com)

12-Month Trend Summary

Over the past 12 months, the Shai Gilgeous-Alexander 2018 RPA Patch Auto Purple /99 has experienced notable price fluctuations: -

Peak:

In June 2025, a PSA 10 graded card sold for $87,840.00. -

Dip:

In January 2024, a raw card sold for $1,730.00. -

Current Value:

As of August 2025, raw cards are averaging around $3,800.00. These fluctuations suggest a volatile market, influenced by factors such as player performance, market trends, and collector interest.

Most Valuable Cards & Key Investments

Here are some notable Shai Gilgeous-Alexander 2018 RPA Patch Auto Purple /99 cards:

PSA 10 Graded Card:

Sold for $87,840.00 in June 2025.

BGS 9/Auto 10 Graded Card:

Sold for $40,800.00 in July 2025.

Raw Card:

Sold for $3,800.00 in August 2025. These sales highlight the card's value across different conditions, with graded cards commanding higher prices.

Population Report + Scarcity Commentary

The scarcity of the Shai Gilgeous-Alexander 2018 RPA Patch Auto Purple /99 is underscored by its limited population: -

PSA 10:

6 copies in existence. -

BGS 9/Auto 10:

33 copies in existence. -

BGS 8.5/Auto 10:

9 copies in existence. This limited availability contributes to the card's high demand and value among collectors.

Upcoming Competition or Player Bio

Shai Gilgeous-Alexander is a rising star in the NBA, known for his versatility and scoring ability. As of September 19, 2025, he is expected to lead the Oklahoma City Thunder in the upcoming games:

NBA Schedule

- Thunder @ Hornets on Sunday, Oct 05, 2025 at 02:00 PM PDT - Thunder @ Mavericks on Monday, Oct 06, 2025 at 05:30 PM PDT - Hornets @ Thunder on Thursday, Oct 09, 2025 at 05:00 PM PDT - Thunder @ Pacers on Saturday, Oct 11, 2025 at 04:00 PM PDT - Thunder @ Bucks on Tuesday, Oct 14, 2025 at 05:00 PM PDT - Nuggets @ Thunder on Friday, Oct 17, 2025 at 05:00 PM PDT His performance in these games could influence the card's market value, as strong performances often lead to increased collector interest.

Buy / Sell / Hold Outlook

Given the card's limited population, historical sales data, and Shai Gilgeous-Alexander's rising prominence, the outlook is: -

Buy:

For collectors seeking a rare and potentially appreciating asset. -

Sell:

If holding a graded card and aiming to capitalize on current market demand. -

Hold:

For those who believe in the player's long-term potential and prefer to retain the card. Decisions should align with individual investment goals and market conditions.

FAQs

How accurate are these values?

These estimates are based on recent sales data and population reports from reputable sources.

What are the best brands to invest in for long-term value?

Topps Chrome RCs (rookies), Panini Prizm, and National Treasures are known for holding value over time.

How do I know if my card is worth grading?

Check for centering, corners, edges, and surface quality; cards in mint condition are prime candidates for grading.

What does PSA 10 mean?

PSA 10 is Gem Mint—virtually perfect, with no visible imperfections under magnification.

Why do some cards have refractor or parallel versions?

Refractors and parallels are special print variations—often shinier or colored—that are produced in smaller quantities, making them more collectible and valuable.

How often should I check card prices?

Markets shift quickly, especially during player call-ups, hot streaks, or playoff runs. Checking weekly—or even daily for prospects and stars—helps you stay on top of trends.

Methodology & Ethics

Data sources — Goldin Auctions closing prices, eBay Terapeak analytics, and PSA Auction Prices Realized.

Sampling window — We analyse the latest 90 days of public sales. A grade appears in our tables only when at least three verified transactions exist for that grade.

AI-grading disclaimer — MarketSnap’s grade suggestions are algorithmic and should be verified by a professional grader before you buy, sell, or submit a card.

Affiliate transparency — When you click a link to an external marketplace we may earn a referral commission at no extra cost to you. These partnerships never influence a card’s ranking or our editorial commentary.

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