Looks like you posted what you needed just fine.
HP/model 28 values historically lagged behind the more highly finished N frames, but they have gone up in value greatly over the past 2 years or so. If the overall finish condition matches your photo and it is mechanically the same, I would guess this one to be in the $700-750 range. Very nice, enjoy!
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Alan
SWCA LM 2023, SWHF 220
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