Both appear to be in very nice condition. Whether either is worthy of the reserve is another question. You need to level with yourself about a few things. First, what is your realistic budget ceiling? You don't need to broadcast the number here, just keep it in the top of your mind. Consider your location in conjunction with the very different locations of the prospect rigs. How much will it cost to have either one transported to you? Is that in the budget? What will be the primary purpose of the rig? Extreme trail buggy? Mall cruiser? Mostly highway with some occasional 4x4?
In my opinion, the gold one seems a bit much for what is there. Sure, the seller has listed prices on items that have been replaced etc, many of which seem a tad high. The one item that gets my attention is his original purchase price of 11k. If he had to replace such a litany of parts plus a frame off resto, what condition was this thing in when he bought it for an eye-popping 11k? And why go to all that trouble and not freshen all the engine gaskets, seals, paint etc while he was at it. You're going to sink nearly 30k into a 50 year old rig and not address the engine at all? Seriously? I call bullshit on that. Frankly, I don't see a dime over 10k in that rig as it sits, and I think that is being very generous. If he got taken for 11k initially for it in rough condition, that's his problem, not yours.
The red one does seem more in line with reality, although we don't know what the reserve is. The current bid price has still not satisfied that amount.
I see buying old rigs on greedbay as a very risky proposition. Myself, I much prefer being able to kick the tires, hear the engine and take it for a spin before I empty my wallet. Body filler doesn't show up all that well in pictures, either. But a trained eyeball can spot it, and a magnet held in the hand and passed over the body will tell you if there are large quantities of the stuff. Proceed with caution.