I've got a guy who wants to trade me some tanks. The item I have I'm trying to sell for $750. I'm willing to trade for a pair of steel 100's, but I'm not overly excited about the condition of these tanks. They have a current hydro/viz. Since I'm balking, he's thrown in a 3rd tank and all new valves.
Sounds like you have decided to pass on the deal. Good call. Four comments:
1. It appears from at least one photo that at least one cylinder is an X7 3442 psi cylinder. Are all (three) of them 3442 cylinders? Is the third one also a HP100?
2. Several posters have pointed out some of the differences between PST and Worthington cylinders on one hand, and Asahis. The differences are not necessarily good or bad. Some like the buoyancy / trim of Asahis, others don't (I don't). It is a matter of personal preference as much as anything.
3. I have no idea what you are trying to sell for $750, and whether your price is high, low or reasonable. So, whether a trade is or is not fair is impossible to judge. If I were considering buying these cylinders, I wouldn't pay more than $150 each. (I have paid ~$200 each for four PST HP100s over the past few years, and felt like that was good value. For me, these would not justify $200 each.) One cylinder appears to be in current hydro. One definitely isn't. Don't know about the third. The VIP stickers are irrelevant to your decision. Oakley sunglasses wouldn't mean anything to me as an incentive.
4. I don't see a lot of rust in the pictures. There may be a bit of a line right above the boot on (at least) one, and a tiny bit around one hydro stamp. That isn't necessarily a deal breaker. Obviously, the interior condition as well as the condition under the boot would influence the decision.
If you really want some steel 100s, offer the seller $150 each. See what happens. All he can do is say 'No'. Just like buying on eBay - you can get some good deals, but you have to be disciplined in bidding, and willing to walk away without hesitation.