King Duo Gravis Silver Sonic
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King Duo Gravis Silver Sonic
Looking for the value of a King duo gravis ca.1975 with original triggers, d & e slides, in very good condition. He's asking $3000. Is that too much? Thank you.
- Matt K
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Re: King Duo Gravis Silver Sonic
Silver sonics tend to go for way more than a yellow brass counterpart. $3k doesn't seem too far off the mark to me imo
- HawaiiTromboneGuy
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Re: King Duo Gravis Silver Sonic
$3000 is a great deal. When I sold mine a few years back, it sold for $4400 on eBay.
Drew A.
Professional bum.
Professional bum.
- greenbean
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Re: King Duo Gravis Silver Sonic
Yeah, they generally go for somewhere between $4k and $5k, depending on condition and need for work. You'll almost certainly want to split those triggers.
Tom in San Francisco
Currently playing...
Bach Corp 16M
Many French horns
Currently playing...
Bach Corp 16M
Many French horns
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- greenbean
- Posts: 1876
- Joined: Fri Mar 23, 2018 6:14 pm
- Location: San Francisco
Re: King Duo Gravis Silver Sonic
In fact, I am looking for one, so perhaps you could contact me if you decide to pass... 

Tom in San Francisco
Currently playing...
Bach Corp 16M
Many French horns
Currently playing...
Bach Corp 16M
Many French horns
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- Posts: 4
- Joined: Sat Jul 15, 2023 1:04 pm
Re: King Duo Gravis Silver Sonic
Thank you all for your replies. I was actually seeking an honest appraisal of the horns worth before offering it back to the original owner. He had no use for it, but enjoyed playing it again. I'll probably be selling it soon (at closer to its current value).
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Re: King Duo Gravis Silver Sonic
Hey Matt - I'd like to list this horn in the classifieds but can't figure out how to add pictures. I watched your video (thank you), but don't know how to get to the full editor and review page. Thank you.
- BGuttman
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Re: King Duo Gravis Silver Sonic
Under the Quick Reply box there are two buttons: one to submit and the other for the Full Editor. Also, if you click on the Edit Post (I think it's a pencil) that also puts you into the full editor.
Bruce Guttman
Merrimack Valley Philharmonic Orchestra
"Almost Professional"
Merrimack Valley Philharmonic Orchestra
"Almost Professional"