Another thought(s) on value. I don't know about Central Missouri even though I lived in St. Louis for several years but around here in Central Virginia price wise a ANIB (As New In Box) with all documents, tools etc. is right now in the $1200 to $1400 range, and mine (all original but no box or docs, tools) is $800 to $900 and they do not last long.
Both above examples are at LGS and have been for about 3 weeks, so I expect a drop of about $50 to $100 each if still there in another 2 weeks, however add to that the taxes, fees, etc and you are right back at list, so this may give you some money ranges to begin your negotiations. Generally, private sales (face-to-face, no paperwork) in this area are anywhere from $200 -$300 less than above LGS list depending on of course, the financial needs of the Seller (immediate to don't really have to sell) and your skills at negotiations.
If the one your about to see were a private listing in my area I would have 5 Benjamins in my pocket, plus 3 Grants ($650) and a bore light, feeler gauge, PROPER screwdriver and hollow ground bits, nice cotton cleaning rag, and really look it over..check the usual end shake, timing, lock up, hammer push off and then ASK if grips can be removed (I usually ask if I can, or does the Seller want to, or not at all) and I do all this BEFORE pulling any cash out.
Last tip, WAIT until after it is yours before drooling!
