Basketball — 2018 Cornerstones Card Prices & Values (2026)

Complete 2018 Cornerstones price guide: 1 cards tracked, total set value $26968.03. Prices last updated: August 30, 2026.

2018 Cornerstones Market Snapshot

Total Set Value: $26968.03
Average Card Price: $26968.03
Lowest Priced Card: $26968.03
Cards Tracked: 1

How Guardian Calculates 2018 Cornerstones Prices

Guardian builds this set price guide from live raw card prices, graded estimates, recent sales, and outlier checks across supported marketplaces. The total set value is the sum of tracked singles with current market prices, while PSA columns show graded-card estimates when enough data is available.

Read the full Guardian Oracle pricing methodology.

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Most Valuable 2018 Cornerstones Cards

#	Card	Rarity	Raw	PSA 9	PSA 10	30d
20	Kobe Bryant [Downtown]	Unknown	$26968.03	N/A	N/A	N/A

Cheapest 2018 Cornerstones Cards

Card	#	Rarity	Raw Price	PSA 10
Kobe Bryant [Downtown]	20	Unknown	$26968.03	N/A

2018 Cornerstones Checklist by Number

#	Card	Raw Price	PSA 10
20	Kobe Bryant [Downtown]	$26968.03	N/A

How many cards are in 2018 Cornerstones?

2018 Cornerstones has 1 cards tracked with a total set value of $26968.03. Most valuable: Kobe Bryant [Downtown] ($26968.03).

What is the most expensive card in 2018 Cornerstones?

The most expensive 2018 Cornerstones card is Kobe Bryant [Downtown] at $26968.03. The set has 1 cards with a total value of $26968.03.

Is 2018 Cornerstones a good investment?

2018 Cornerstones contains 1 priced cards worth $26968.03 total. The most expensive card is Kobe Bryant [Downtown] at $26968.03. Check our Basketball market movers for current trends.

When was 2018 Cornerstones price data last updated?

2018 Cornerstones prices were last updated August 30, 2026. Guardian TCG refreshes card data daily from TCGPlayer, eBay, and CardMarket.

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2018 Cornerstones Price Guide — Card Values & Prices (2026)