I really like the TV line. I own several. Most I bought in person from the Daniels during a knife show, or from others at shows that had them for sale, so I was able to hold/see the knife in person before I purchased it. Most do not come razor sharp, but do have a good edge on them. Some particular patterns have slight flaws that seem common across the board, such as the secondary blade on every Railsplitter pattern I have held has a slight side-to-side wobble. Also the Teardrop pattern blade when closed barely kisses the inside of the backspring, which shows a tiny mark on the blades edge. I'm sure if you sharpened the blade a few times this would be gone.
So far every one I own has tremendous quality handle materials (stag, horn, or ivory), very nice attention to detail on the bolsters, swedge, etc. All the ivory handled ones have fluted ivory, which I believe is a unique trait only to the Tuna Valley series. I was told by the Daniels that every knife is inspected before it leaves the factory. I have heard of some being returned for various reasons, but so far I'm a happy camper with what I have.
1 reason I like to collect them is that they are always made in very short quantity runs. Once a pattern is made, it will never be made in that exact same pattern/blade/handle combination again. They also only release 2-3 patterns a year, so it makes them desirable as they aren't flooding the market. Prices are higher than most for a collectible knife, but I think that the quality and low quantities justify it. Second hand ones seem to hold about 80% value of original sales price, if they aren't used.
The 2009 and 2010 knives were made by GEC, the 2012 were made by both GEC and Queen, and all from 2013 and after have been made by Queen only.
Regarding the Tuna Valleys, if the blade is etched "EDC", that means that it was a rejected knife when inspected. These knives are still fine for users, but don't hold any collectibility value. They may have a handle crack/flaw, or bad blade wobble, etc. They also were not sold with a tube, or CoA.
Hopefully that is helpful.