Thank you for the information and pictures Nicole.
Your Baby Grand Piano was made by the Everett Piano Co which was established in Boston in 1883.
In the records the serial number 38070 gives the year of build as 1906, so your piano is around 110 years old.
Apart from a very few unique and rare instruments, pianos are not usually bought as antiques in the furniture sense of the word because they are bought to be played.
Generally pianos have a limited life span of 60 to 70 years, mainly due to the wear during use and particularly due to the natural deterioration of the major mechanical parts such as the action, the strings, the soundboard, the tuning pins, the pin block, etc., over time. This can be extended by careful regular maintenance/tuning/repairs and some restoration over the years or a total re-build/restoration of the major mechanical components. Thus one of the overriding factors in any appraisal valuation on a piano is the age and condition of the internal mechanics. The outside caseworks looks to have been refinished at some point over the years.
Based on the information I have on this Everett Baby Grand Piano dated 1906 and judging from the photographs the internal mechanics are as originally built (as you stated), I believe it has a value for a private sale in the $1,500 to $2,000 range. You mentioned a figure of $18,000 in your question which I am assuming was for a totally restored/re-built piano. As it costs many thousands of dollars to carry out such a total re-build I would not suggest doing it unless you intend to keep it for a long time as a family heirloom. Selling it immediately after such work has been completed could result in a loss for you - the only way a 'restored' piano gives a return on investment is when the work is completed by a restoration company at cost and they can then make a profit when the piano is sold, even then it can be a risky investment and can be a long waiting game!
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