Heres what I am seeing through this thread, including a lack of proof and a lot of excuses...
Lou...
Eddie received a dead snake from you. Regardless of whos fault it is Lou, do you NOT guarantee live arrival? If you DO guarantee live arrival, what is your TOS? You keep mentioning they have to sign on first delivery attempt, however, you dont make it a "signature required" transaction? That, to me, makes no sense.
Sure, you may have all these emails supporting you and a ton of people stating that they will buy from you, but... I dont believe you for the simple fact that you will not or cannot post any of your evidence OTHER than the fact he didnt sign on first attempt.
I used to live in Las Vegas where on Christmas its 85+ degrees by 8AM. There is no excuse for an animal to arrive dead if packed right, even if its received late.
You also offer a replacement snake if he pays you MORE money. What is this? You say its for shipping right? 100.00 to ship a Spider using SYR.com? How much money do you need to milk out of this guy to make things right? You just need to stick to local sales until you actually learn to ship according to weather. The simple fact that you EVEN used a heat pack for a shipment to somewhere where its 85 degrees is a joke in itself. You say its 33 degrees when you shipped out in your hometown but you DO realize that the snake RARELY stays in your area for very long right?
Eddie...
Whether he used 1 or 3 heat packs, you should REALLY be aware of your local UPS or Fedex drivers for your area. Get to know them as well as the local hubs. When I lived in Vegas, I used to get so many shipments that Fedex would hold my packages for me at their location so I could pick them up there or make sure I was in the office for delivery. They even knew me by name and stuck around to see the newest snake I received.
One BIG thing I would suggest is make sure you are dealing with someone who first and foremost, has enough of a reputation to make sure you will get living animals that can survive at least 30 hrs in transit, no matter what the weather is

Sometimes, shipping companies will lose animals for a day and you will really want to make sure you are dealing with someone whos NOT going to make you eat the costs, regardless of what their TOS is.
You have some reputable friends, like Chris, that you should hit up for advice prior to making a purchase so they can help steer you into making a better decision as to whom to buy from. Dont always look for the best price or best deal because, unfortunately, this is generally a product of what happens when it comes to dealing with inexperienced dealers. Make sure you always get some sort od TOS in writing too so you dont have to go through this in the future.
I DO have one issue with you though... Were you planning on quarantining this new animal before trying to breed it with your female or were you just going to throw them in with each other and make a go of it? If you were, in fact, planning on a quarantine period, the size of your male shouldnt matter all the much being that he only needs to get to 500ish gr before he can breed.
To sum this all up...
Lou, as a seller, you have TONS more to lose than Eddie does as a buyer in the long run. If there is no good closure at the end of this transaction, you wont just lose 350.00 in sales. I would estimate your losses at least 10 times that amount, at a minimum. Just look at how many people have viewed the thread already

Once they see that your animals cant stand travel, how many do you ACTUALLY think will buy from you that cannot pick up from you directly or havent dealt with you in the past?
Regardless if he didnt pick up the animal on first delivery, the fact still remains that your snake was not in any condition to survive the transit to begin with as 85 degree temps would NOT kill a Ball Python or a Boa for that matter, if packed right. You didnt even give him 72 hours to make sure he was healthy and satisfied with his purchase. If this guarantee is null and void simply because he received his snake a mere 4 hours AFTER he should have, you might as well NOT ship since there will be more times than not that a package will arrive late.