Anyone who is thinking of making an investment will want to know what sort of return she is join to get for her capital. This return will be in main proportional to the number of items that can be sold. The price, by and large, will also be dependent on the volume of sale, especially if injection moulding is involved, i.e. the bigger the expected volume the lower the price that can be charged.
These particular products, British outline OO gauge pointwork, will be going into a mature market. By that I mean that just producing these points is very unlikely to increase the number of people building OO layouts. As a consequence each set of new points sold would be a substitution for a set of points in an existing range. Some of these may be from the set track ranges, but most are likely to be from Peco's streamline range. So what the investor really needs is to know is the volume sales of Streamline points. From this information of volume sales of the new points can be seen as a proportion of sales of existing products, and a target of say 40 or 50% of streamlined sales could be set for the new points.
Of course she could ask Peco but they are likely to see her as competition and not give her an answer. As an alternative she could ask wholesalers, such as Guagemaster or box shifters such as Hattons. If she asked enough of this type traders then she would be able to form a good estimate of the volume sales of these points. Not only that, but traders are likely to give her much more information about the market for points and also tell her whether they were likely to stock the new points. This would give a good indication of what the initial sales are likely to be.
However there is a large risk should borne in mind. That is, because sales are being taken from just one company, i.e. Peco, then it is possible that between the time that a commitment has been made to new tooling and the new products on the market, Peco could bring out their own rival range, and so negate any investment made by our investor.