Boston GP178 Piano: What It's Worth in 2026, Prices & Listings
- Size
- 5'10" (178 cm) grand
- Made
- In the Boston line since 1992; the GP178 II is the current version
The Boston GP178 is the mid-size Boston grand: 5'10", the same size as a Steinway O, with Steinway's scale design executed by Kawai in Japan. It is the Boston most often chosen by serious amateurs and teachers.
Used GP178s are common through Steinway dealers and hold value well; condition is usually good because most are only a decade or two old.
What a Boston GP178 is worth in 2026
Median asking
$16,999
Lowest
$12,789
Highest
$38,200
Live asking prices from 9 priced Boston GP178 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.
GP178 prices sit above the GP156 and below a Steinway O. See the live figures above.
| Decade | Listings | Median | Range |
|---|---|---|---|
| 1990s | 3 | $13,900 | $12,789–$16,999 |
| 2000s | 3 | $15,800 | $14,995–$17,995 |
Get a free instant appraisal for your GP178 or compare Boston against every major brand.
What to know about the Boston GP178
- The GP178 II is the current revision; earlier GP178s and Performance Editions price a little lower.
- Steinway dealers accept Bostons in trade toward a Steinway, which supports resale.
- Compare with a Kawai of the same size — the Boston shares its builder — and with a Yamaha C2/C3.
- Player systems are sometimes fitted; value the acoustic piano first.
Boston GP178 pianos for sale now
DealerGood Deal1999 Boston GP178 II
San Antonio, TX
Grand · Good condition
Alamo Music Center
Nationwide Delivery Available
$12,789
View details
DealerFair Deal2007 Boston GP178
White Plains, NY
Grand
Faust Harrison Pianos
Nationwide Delivery Available
$15,800
View details
DealerFair Deal2007 Boston GP-178
Las Vegas, NV
Grand
Las Vegas Pianos
Nationwide Delivery Available
$14,995
View details
Dealer2025 Boston GP178
Alpharetta, GA
Baby grand
Steinway Piano Galleries
Nationwide Delivery Available
$38,200
View details
DealerFair Deal1994 Boston GP178
Alpharetta, GA
Baby grand
Steinway Piano Galleries
Nationwide Delivery Available
$16,999
View details
DealerFair Deal2019 Boston GP-178
White Plains, NY
Grand
Faust Harrison Pianos
Nationwide Delivery Available
$19,900
View details
DealerFair Deal2004 Boston GP178
Sarasota, FL
Grand
Piano Distributors
Nationwide Delivery Available
$17,995
View details
DealerFair Deal1996 Boston GP-178 5'10'' Grand Piano Satin Ebony
New London, CT
Grand
Caruso Piano Gallery
Nationwide Delivery Available
$13,900
View details
DealerBoston GP-178 Ed. 2 w/ Player System EP
Milford, MI
Player
PianoNation
Nationwide Delivery Available
$26,995
View detailsFrequently asked questions
What is a Boston GP178 worth?
See the live snapshot above; GP178s are among the better-holding mid-market grands.
GP178 or Kawai RX-3 / GX-3?
Kawai builds both. The Boston uses Steinway's scale design and comes with the Steinway dealer trade-up; the Kawai is usually less expensive for the size.
Selling a Boston GP178?
Run a free instant appraisal, read how to sell your piano, then list it free on US Piano Connection and reach buyers nationwide.