Let's do the math.
Bought a GNote3 for $200 + tax = $212 + $30 upgrade fee = $242. Use it for a year, and at current market prices net $300 when resell it (that is what a GNote2 in excellent condition will net right now so my assumption is that a year from now that is what a GNote3 will net).
So $300 - $242 = $58 profit on the transaction.
Buy a new GNote4 the next year for $700 + tax = $742. Cost of the GNote4 is $742 - $58 profit on the sale of the GNote3 = $684.
Thus, to get a new GNote3 and a new GNote4 would cost you $684. However, you still have the GNote4 to sell and assuming current market prices, you should be able to net $300 on that sale (assuming you keep it in excellent shape; obviously it would be less if you don't). So $684 - $300 = $384.
Over 24 months, that works out to be $384/24 = $16/mo, which is about half what the Edge program charges when you figure in the tax. So in the current market environment, you would be better off by half to stick with subsidized phones and still get a new phone each year. Of course, I am assuming you keep your phone in excellent condition and that the resale value a year from now for a 1 year old Note is the same as it currently is.
So the Edge program is nice if you wouldn't sell your phone on your own, or don't want to try to keep your phone in excellent condition, but you pay for that convenience, which is how things always work. Only time will tell if these programs knock down the resale value of these phones.
BTW - what happens if you ding up your phone on the Edge program? Can you pay off 50% of the value and still upgrade if you are giving them back a damaged phone? What about one that works but is cosmetically damaged?
So, I got a chance to do some analysis on my own because now I am worried that I am getting screwed and the example, I list below confirms what the guy was telling me at the Verizon store.
Assume you go with the Edge plan..
To upgrade after paying half of the Note 3 off, you would pay a total of 407.11. This is approximately half the cost of the phone (699.99) and 8.25% tax. After those 12 months are up, I then upgrade and pay off half of the new phone. That would be another 407.11. This would run me 814.22 for the 2 years.
Now, assume that you do not go with the Edge plan and you buy the product through a Verizon store:
Out the door, it will cost you 299.99 plus tax and activation which would run you 392.66. The next year, I want to upgrade which to be honest with myself is what I normally do, I then add another line to my family share account. That would run me $10 per month for 24 months. Now I have an additional line under contract. That would be $240. At that time, I choose another phone and pay the 299.99 plus tax and activation which would run me another 392.66. Now the total for that option for the course of 2 years would run me 1025.32.
While renewing my contract would cost me more after 2 years, it does not factor in selling the phone on Craigslist, Ebay or other which is normally what I do every year. So, if I assume the phones will be worth around $150 each through Gazelle or other, then the actual cost on renewing my line after 2 years would be 725.32. That is approximately a $90 savings over the course of 2 years. For me, this is not worth the hassle and the risk of opening up another 2 year contract with a carrier in case, there service slides downhill or I move to another area where the service gets horrible.
To answer your question about phone condition when you turn it in. The phone has to be in resellable condition. I always gets insurance. I did not for a period of time and got massively screwed. I was thrown into a pool once with my phone in my pocket and did not have insurance so, i had to pay full retail. Then I got insurance right after that and was thrown in the pool again. I also was cleaning my pool once and it was real windy and it blew me into the pool after I lost my balance. Another time, my power button broke on my iPhone. Because I had insurance I saved myself one large repair bill.
Now in overall cost savings. If you do not upgrade and stay with the same phone for the full 2 years, you will save money in the long term. Heck, I struggle to keep a car for more than 3 years. I get tired of a phone after a year. Also, if you have unlimited data you are on the old plan so, the upgrade to the new price plans might not make sense. But for me, the Edge program works.