George Brett Base #11 · Topps Project 2020 (2020) | PopHunter

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George Brett

Name: George Brett
Brand: Baseball
SKU: cmqf048e8jksyz814t1z3nbyp

Base💎 42.9% gem

Topps Project 2020 · #11 · 2020

eBaySearch Sold comps

Estimated Market Value · BGS 9.5

Estimate

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Where this card's market sits right now — modeled from its real sales and the movement of comparable markets.

PSA 10 $

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PSA 10 Pop

Gem Rate

42.9%

30D Change

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Market data as of Jul 5, 2026

Opportunity

48.0

Collector

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Investor

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Speculation

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See pricing to unlock Collector, Investor & Speculation scores

Market

PSA10 / PSA9

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Active Listings

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PSA10 Mkt Cap

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PSA 10 Price

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30D PSA10

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90D PSA10

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Raw Price

$225

30D Raw

+8.2%

90D Raw

+25.4%

Prices by Grade & Grader

Population Reports

PSA Population

28 total

PSA 10

PSA 9

PSA 8

PSA 7

PSA 6

PSA 5

PSA 4

PSA 3

PSA 10 Price

PSA 9 Price

PSA 10 Population

Total Population

Opportunity Score

Active Listings

Recent Sales

Date	Grade	Price	Platform	Title
Jun 21, 2026	Ungraded	$225	ebay	Topps Project 2020 George Brett #11 Kansas City Royals Baseball Card 2020 #11
May 11, 2026	Ungraded	$280	ebay	2020 Topps PROJECT 2020 Card #11 1975 George Brett by Gregory Siff PR 1227 #11
Apr 20, 2026	Ungraded	$230	ebay	2020 Topps Project 2020 #11 George Brett by Gregory Siff - SEALED #11
Jan 27, 2026	Ungraded	$100	ebay	2020 Topps Project 2020 1975 Topps /1227 George Brett - Gregory Siff #11 #11
Jan 12, 2026	Ungraded	$123	ebay	2020 Topps Project 2020 1975 Topps /1227 George Brett - Gregory Siff #11 #11
Dec 19, 2025	Ungraded	$200	ebay	2020 Topps Project 2020 - 1975 Topps George Brett #11 Gregory Siff /1227 #11
Aug 5, 2025	Ungraded	$127	ebay	2020 Topps Project 2020 - 1975 Topps George Brett #11 Gregory Siff /1227 #11
May 22, 2025	Ungraded	$270	ebay	2020 Topps PROJECT 2020 Card #11 1975 George Brett by Gregory Siff PR 1227 #11
Apr 2, 2025	Ungraded	$240	ebay	2020 Topps PROJECT 2020 Card #11 1975 George Brett by Gregory Siff PR 1227 #11
Mar 3, 2025	Ungraded	$180	ebay	2020 Topps Project 2020 George Brett #11 Gregory Siff PR /1277 Royals M412
Nov 27, 2024	Ungraded	$150	ebay	2020 Topps Project 2020 George Brett #11 Gregory Siff #11
Aug 30, 2024	Ungraded	$299	ebay	2020 Topps Project 2020 - 1975 Topps Gregory Siff #11 George Brett #11
Jun 21, 2024	Ungraded	$138	ebay	2020 Topps Project 2020 #11 George Brett by Gregory Siff PR /1227* ROYALS
Jun 27, 2023	Ungraded	$178	ebay	George Brett 2020 Topps Project 2020 by Gregory Siff #11 Royals W/ Box PR 1227
May 23, 2023	Ungraded	$294	ebay	George Brett 2020 Topps Project 2020 by Gregory Siff #11 Royals HOF GH9
Nov 6, 2022	Ungraded	$233	ebay	George Brett 2020 Topps Project 2020 #11 Factory Encased w/ Topps Now Package
Oct 20, 2022	Ungraded	$350	ebay	2020 Topps Project 2020 GEORGE BRETT #11 Greogory Siff With Box Print Run 1,227
Jul 3, 2022	Ungraded	$251	ebay	2020 Topps Project 2020 #11 George Brett Gregory Siff PR 1227 #11
Jun 25, 2022	Ungraded	$299	ebay	2020 Topps Project 2020 #11 George Brett Gregory Siff PR 1227 Box PERFECT #11
Jun 14, 2022	Ungraded	$200	ebay	2020 Topps PROJECT 2020 #11 1975 George Brett By Gregory Siff Print Run 1,227 🔥 #11
May 28, 2022	Ungraded	$306	ebay	2020 Topps PROJECT 2020 Card #11 1975 George Brett - Gregory Siff REAL AUCTION #11
May 21, 2022	Ungraded	$300	ebay	2020 Topps Project 2020 Card #11 1975 George Brett by Gregory Siff PR 1227 Box #11
Nov 12, 2021	BGS 9.5	$291	ebay	2020 TOPPS PROJECT 2020 #11 GEORGE BRETT GREGORY SIFF BGS 9.5 GEM MINT ROYALS #11
Oct 9, 2021	PSA 9	$184	ebay	2020 Topps Project 2020 #11 George Brett (Gregory Siff) /1227 PSA 9 MINT HOF
Sep 5, 2021	Ungraded	$550	ebay	2020 Topps PROJECT 2020 Card #11 1975 George Brett by Gregory Siff PR 1227 w box #11
Aug 13, 2021	Ungraded	$420	ebay	2020 TOPPS PROJECT 2020 1975 TOPPS GEORGE BRETT DESIGNED BY GREGORY SIFF #11 KC 11
Aug 5, 2021	Ungraded	$289	ebay	2020 TOPPS Project 2020 Card #11 George Brett / Gregory Siff / Print Run = 1227 #11
Apr 12, 2021	Ungraded	$415	ebay	2020 Topps Project 2020 #11 George Brett By Gregory Siff Print Run: /1,227
Apr 11, 2021	Ungraded	$575	ebay	2020 Topps PROJECT 2020 Card #11 1975 George Brett by Gregory Siff PR 1227 w box

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PopHunter surfaces potentially undervalued scarcity and relative value signals. This is not financial or investment advice. Always do your own research before purchasing graded cards.