Boston GP156 Piano: What It's Worth in 2026, Prices & Listings

Size: 5'1" (156 cm) baby grand
Made: The Boston line launched in 1992; the GP156 has been the smallest grand since

The Boston GP156 is the smallest grand in the Steinway-designed, Kawai-built Boston line: a 5'1" baby grand that brings Steinway's scale design to a home-sized piano at a mid-market price.

Used GP156s are relatively young and usually well cared for, often sold through Steinway dealers with a trade-up history. Their value is bounded by size.

What a Boston GP156 is worth in 2026

Median asking

$13,800

Lowest

$13,800

Highest

$19,795

Live asking prices from 7 priced Boston GP156 listings on US Piano Connection right now, refreshed hourly. Dealer asking prices include prep work, warranty and delivery; a private sale realistically brings less than the dealer median for an ordinary example.

GP156 prices are steady and modest. See the live figures above.

GP156 asking price by decade built
Decade	Listings	Median	Range
1990s	2	$16,798	$13,800–$19,795
2000s	4	$13,800	$13,800–$14,400

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What to know about the Boston GP156

Designed by Steinway, built by Kawai in Japan; it shares no parts with a Steinway but benefits from the design.
Steinway's trade-up policy means many used GP156s come back through Steinway dealers.
Performance Edition (PE) versions from the 2010s add refinements and price higher.
A 5'1" grand has limited bass; the GP156 wins on touch and dealer support.

View details

Dealer

Boston GP156 (Pre-Owned)

Tallahassee, FL

Baby grand

Jim's Pianos

Nationwide Delivery Available

$14,200

View details

DealerFair Deal

1998 Boston GP156

Detroit, MI

Baby grand

Solich Music

Nationwide Delivery Available

$19,795

View details

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Frequently asked questions

What is a Boston GP156 worth?

See the live asking prices above; GP156s hold value reasonably well through Steinway dealer channels.

Is a Boston piano a Steinway?

No. Boston is a Steinway-designed brand built by Kawai. It is a good piano in its own right, and Steinway dealers accept it in trade toward a Steinway.

Selling a Boston GP156?

Run a free instant appraisal, read how to sell your piano, then list it free on US Piano Connection and reach buyers nationwide.