Some of the more iconic of car models or series will be collectible, and there is nothing more iconic than the Corvette. It is no longer under production and these means that there are certain availability issues involved in getting things like Corvette interior parts. These parts are valuable to owners of their collectible units.
However, there are many ingenious artisans and craftsman who also appreciate their iconic cars. The Vette especially has created a niche industry that takes care of spare parts need and maintenance or repair services. Machine shops with experts in the interiors and engines of any model in a series that ran for some decades may be at work here.
For consumers this means that they need to access the network of suppliers of these items. Though not OEM some may be certified by the manufacturer and therefore can create the more reliable products for use. Repairs will often need replacement of certain damaged parts and for the money these can preserve the value of a Vette.
The manufacturers are often smaller shops and may have started as hobbyist locations. This means that the work that they do is often done with interest and enthusiasm. And this often leads to some best working components that are produced in the American automotive industry, and while a niche, this niche is proud of its work.
And so it should be, because what they provide their constituents are means for getting more value out of their beloved Corvettes. There is an inordinate amount of time spent on preserving these for any enthusiasts or collector. And more often than not, you cannot market one unit that has some damaged or non working parts.
That means you will have to make your car or cars that much more attractive to potential buyers by completing its components. Some may buy even when the unit is not working and can have it worked out by their own contractors. But pride can be something here, and so too will be the price, which is affected when units are not up to speed.
You have to know your network and for the money when you work with this, you will usually get some things that are rare finds. The enthusiasts often keep their own favorite items that can accessorize and make the Vetter more attractive. And when you have access, more often than not you can get the best deals.
That is something you have to work for, and networks have their own stalwarts. You may be one yourself, so that your interior for the collectible car can be a thing of beauty. Interior parts are hard to come by as OEM these days though and that is something you should accept or adjust to.
In any case some of the best restorers and machine shops can actually provide better imitations. Although there is preference for original, most folks will take what they can get. And this does not actually make a unit less desirable or even priced less.