Ok, they are all nice! Maybe priced a little high, (bad time of year to buy, good time to sell) but all quite nice!
The first one has some nice options (4-speed, vert) will bring a good resale value over all. Disc brakes are nice to have etc... If you can get them down a little, that would be a good candidate.
(on all of them, check the trunk for prior panel repair, flooe pans, wheel wells and lower fron & rear fenders for repair or signs of rust)
The second one get's my vote over all as a dark color paint job has got to have great prep and body work! BUT... it's at a dealer, so you won't have much room to haggle on the price... But over all this one looks the best, tight, clean and sounds to be built right! Heater hoses not hooked up? Bad heater core? something up there? And there is some paint over spray on the hose, like they touched up the paint on the motor? So check it out close
The 3rd one, the 69 looks to be very nice also! New top and very clean, nice options, and good records.. all in all, pretty close on the price, but again a little high for where you could be buying at... but there may be some room to work. (I always like buying from a private party personally) If it was a red car from the factory, then just check all the usual stuff...
The last one I feel is way over priced, and not original enough to carry that price... sounds just ok to me... but not at that price... suspension looks to be modified a little etc... and makes no mention of any real factory options which are the kool part!
The first 3 I believe have posi, and lots of upgrades, as well as nice factory options... I would say, find one with the most bang for the buck. The more options, and the more that has already been done to the car, that you don't have to pay for later, the better!
The hood tach cars are always nice!
I would say the Black Cherry 68 coupe for the money, (but it may be a little radical for what you may be looking for?) then the 69 Ragtop, then the 1st 67 ragtop, then the last 67 ragtop in that order just from a quick over view...
Keep us posted, and let us know if we can help you in your hunt!