I'm in COMPLETE agreement....a three year restoration on my 300C here became an EMOTIONAL and FINANCIAL nightmare. No, we don't "do" these for ROI (return on investment) and if we did, we'd be like the US Govt., running in the red forever. My 300C sucked the life out of me at times given specialty parts availability and costs. Yes, the car is iconic, it's gorgeous, and a head turner, but like stated above, owners are dying, the collectable factor is diminishing and the appeal of these things, in my experience, is that the niche is really, really, getting small. I'm 63 and I think I'm a youngster in Letter Car circles...Want a Letter Car? Great! Buy a done car, pay the right money and enjoy it... I have had more than my share of invested money, time and tears....than to want more again. The nice thing about doing my resto was that I KNOW what's in the car...the bad thing? ALL OF THE ABOVE! I'm so under water in it that I don't even think about it. And then, I started hoarding parts..."just because" and of course, we all do this. I have an extra "this" and two of "these" and then I see the ads for stuff and a lot of the parts aren't even moving. My 300C has probably dropped in value though I increase the insurance each year....duh!
Buy a done car, repair/fix/upgrade to your heart's content and network with the two 300 Clubs, great resources, this site, and other owners....
Anyway, my one cent....I had two cents but the 300C sucked it up! Newport 66 is spot on with those remarks!!!!!
Good luck!