Excellent point. You see so many cars that need a complete restore that are still 'almost' presentable. These are 'traps' in my opinion. You have to pay big bucks and then have to invest big bucks. You never catch up in value. I've seen cars go for 15K on eBay that, in my opinion, are project cars. Project cars that when finished will bring 25K tops. The sticking point is they need 25K in parts and labor! Another 'trap' is a rare car that's missing the rare parts. Lets say you find a real ram air car minus the original drive train. You go through all the trouble restoring it and finding 'like original' rare parts and it's not worth anywhere near what a completely original car is worth. Here's the major sticking point with that type of car: Everybody will agree that it's a cool car and rare but when you go to sell it the rare car collectors frown on it. They won't cut it down but they won't be throwing money at it either. I was talking with a major ram air car collector the other day and he said that he will not touch a car that doesn't have the original engine. He said it's just not worth it.
I haven't seen these two cars in person so I don't know for sure but I think they are very possibly 'traps'.