There's worth and there's worth.
The quality of a knife improves in direct relation to the amount of money you spend, up to a certain point. If you know what you are looking for, you can get a fixed blade knife which serves your purposes for forty dollars, or less, especially if your purpose is to have something you like the look of, but don't really intend on doing any cutting with.
If you are collecting knives based on the assumption that they will increase in value, then it will be necessary to do some research.
From the pictures, it looks like they are all "Frost knives". Although not all of them may have the Frost Cutlery logo, there is a certain type of knife which has become associated with Frost Cutlery. The first telltale sign of a "Frost knife" is the word "Pakistan" on the blade somewhere. Other signs are uneven or asymmetrical bevels, small scratches from the grinding process, large or uneven gaps between blade and guard, and poorly finished guards and pommels. Handle materials tend to be wood, often that rainbowed stuff. It looks nice, but in use, it's very slippery and holding on to these knives is almost as difficult as cutting with them.
Oh yes, about that. The edge bevels tend to be very thick. I've experimented with changing the bevel angle on a couple of these knives to make them cut better. The good news is that it's an easy way to practice sharpening because the steel is very soft. The bad news is, you will get a lot of practice sharpening, because, the steel is very soft.
If you like them, then the re-sale value should not be an issue for you. If you are collecting with the idea of eventual re-sale, you should probably be looking at knives that come with a reputation, or a history that you are sure is real.