Chad,
$140USD seem about right for a part that size based on the volume of material.
I guess I’m a bit cheap – “reasonable” for me is more like $50 for small parts 😀
I would have preferred $50 for certain OneEighthBit! However based upon what I would expect it would cost to have them machined, CNC or otherwise, I am confident I came out ahead by having them printed. One big benefit to printing is that the complexity of the part means very little whereas it may make a huge difference in the cost of having them made using more traditional methods.