The two-door car in the second picture does have the split or V-shaped front window. This indeed could have been a V-16 but what with the body style, the laundalet bars on the folding top, and that windshield it would have necessarily been a quite rare car. This one might actually be traceable in the classic market today just by that grainy picture. However, it should be noted that there was also a V-12 model of that era; one of those with a similar body to the roadster (but not IIRC, witht he split front window) is up for auction this September along with a big V-16 town car. One way to identify the V-16 cars is that there are 5 visible air duct doors on the sides of the hood ahead of the fender mounted spare tires - but those photos are so grainy that I can't really tell.
I am going to have to say that the first car is certainly NOT a V-16, but does appear to be a V8 Cadillac of the era. Still looking, I kind of have hopes that somebody on my car sites may recognize the roadster.
As to value, these (even the 16s) are kind of having a hard time now. One of the 16 cylinder cars got bid up to about 175,000 in a recent auction and did not make the reserve, so remained unsold. Reserve was thought to be about 200K.
As a matter of interest as to value - in that same auction the actual 1928 Rolls-Royce that was driven by Robert Redford in the movie The Great Gatsby (and which had been restored within about 10 years back) only sold for about $275,000.
As for the morality of styling around in this kind of iron while everybody else was slogging through the dustbowl, perhaps our con-man Judge (or was it his predecessor?) was right: Religion is a snare and a racket.