I think there's a very good reason that all decent quality graphite/carbon necked basses are expensive. If the part is made by a reputable builder, perhaps this is OK, but I doubt it is. If people's experience of buying 'replica' carbon framed 'Italian' bikes from China (aka Chinarello), whilst the manufacturers made/stole high precision moulds, the quality of the materials used left many people with broken bikes and in some cases quite serious injuries as the result. Graphite/carbon has the advantage of reducing the variation and unpredictability of materials such as wood and metal, but it requires high quality manufacturing and materials to do so. Take a good look at the weave on a Modulus neck or a Colnago or Pinarello bike, and then check out the weave on a cheap bass neck or Chinarello, perhaps equivalent to the difference between a newly cut off-cut and a selected, well-prepared and seasoned piece of quartersawn maple