The finish is mint in that area which indicates to me that it has never been tampered with or modified in any way from new.
That conclusion makes no sense to me. That year would have a front control plate, so what on Earth would the condition of the finish tell you about whether the switches had been removed or not?
And you can pretty much bet that nothing went out to a retailer like that.
Seems like if it were all original it would be worth around $1500. Does that sound about right to you guys?
No. More like $1,100 to $1,300, if nice player grade, with OHSC. To hit $1,500, it'd have to be somehow very rare, e.g. a special color, or in extremely clean condition. I have several far cleaner and far more rare L-2Ks of that era or earlier, purchased locally this year, and I haven't paid over $1,295.00 for any of them.
Somebody screwed that thing up pretty royally, because vintage repair parts are hen's teeth, and the stuff you can get from G&L today is not a direct replacement. It won't sound the same, won't be built to the same standards of quality, and will
still devalue the bass if installed.
I would sell it as is, ask $1,000 OBO, and be willing to take as little as $700–$800. That's IF the neck is straight and the frets are good, and you have the OHSC.
Someone who had a same-vintage body with a screwed up neck would be the best person to buy it. They could transplant their electronics into your bass, or transplant your neck onto their body (depends which one has the preferable body).
The sad truth (for sellers, but not for buyers) is that these basses are rarely worth selling. They have far more value as quality musical instruments than they have market value. In other words, you have a $1,000 (tops) instrument there that has the raw build quality you can't buy new for $1,000 these days.
Additionally, as a G&L collector, that is not what I would call a "low serial number." My cutoff would be the first generation ones, with the large hex pole pieces: serials in the range of about B00500–B002000 (approximately, and with some exceptions, of course).