This is a very personal and correspondingly different way of looking at things. I really like Chris Convertible's project, for example, and he will have a lot of fun with it. It makes a strong impression to own and to drive such a MGB...with the great sound and the whole quality of the interior, you see immediately that this is not a 3000£ car.
I'm inclined to agree Heinz.
For me, these type of cars fall into the 'passion project' category and creating something you really want takes priority over the cost element of the end product. Most people buying these cars have no plans to sell them and are quite content to spend what it takes to create something that is unique to them. The only downside, if one wants to think of it that way, is if that person choses to sell the car. Unless you are very lucky, and the company has created a strong, valued, brand (Singer and RUF are two I can immediately think of), chances are the money you put into the project is unlikely to be reflected in the sales price. Rocketeer & Frontline are both good examples. However, the same could be said for when people follow their hearts and restore a classic car - more often than not, once the project is done, the cost expended isn't reflected in the market value of the vehicle - hence why so many half completed restorations come up for sale.
Ultimately, it boils down to personal opinion and what the owner values - if resale / retained value is top priority, a modified car, no matter how well done, is more than likely going to be a risky proposition; however, if having something unique and the process of being involved in the creation of it is important, the money will seem well spent.
