I like the idea. I agree with jwright9 about having a series of generic shapes that would appeal to a cross section of people. I don't think it has to be a blah rectangle just something that would appeal to people without a music background. Wood prices vary quite a bit by variety and current market so I think you would want to have either per piece pricing or tiers to cover common woods, not so common woods and rare woods. Along this same line I think the tiers would also need to cover construction complexity. In other words a stand with laminated hard maple and walnut might be in the middle tier due to construction although the woods would put it in the common wood pricing tiers.
I'm not sure any of us can help very well with pricing as we don't know your costs. These would be the cost of materials, your time (construction and administration), shipping and shop (electricity, ROI on equipment, etc). If you are planning on turning this into any type of serious part time or full time business then you also have self employment taxes to think about. After all of this you will need to determine what type of profit margin you want on the product. Once these actions are complete you should be able to come up with a price of range of prices you need to not lose money.
