And therein lay the question: how much are people willing to pay for a model from a single-digit production run of a prototype that will in all likelihood never be mass produced in N scale? It's beginning to appear that a locomotive from scratch (bodyshell and mechanism chassis, other manufacturers' components, paint and decals) will cost between $150 and $250. For me, it's worth it on units such as most of the New Haven electrics since a brass model equivalent would cost 5x that. But is someone else willing to pay $300+ for such a model? Are they willing to pay $30 for just a bodyshell? I'm not so sure. Would someone be willing to spend $90 on an FGE or Mathieson ex-Pennsy R7 reefer of which only four or five may exist? Or would the demand be so overwhelming that it would be impossible to meet? If you offer one of these projects in kit form at 1/3 the price, are there enough people interested in building it on their own? Do you supply the needed components from other manufacturers, or do you instruct the modeler to procure those himself/herself? Are there commercial decals available, and if not, is that another component that must be included? All those questions are important in deciding whether to offer these types of items to the public or just use these methods to fill holes in a personal roster when time and finances allow.