I think there's two ways of looking at it, I clearly see it happening in this topic. The view of a dealer and the view of a hobbyist.
As a dealer you want something that is resellable, preferably gains value over time, and is priced in such a way that you can recoup the shipping and taxes if you sell it on.
As a hobbyist, you want something you like, find interesting etc. and the sell-ability is not that important.
Should a hobbyist care if they sell it later with a loss of 1K $? If you have a hobby car, you can lose that kind of money every year on maintenance. It's just money spent on your hobby.
If I look at these two examples, I think they are interesting; the Nobuie one has an intestesting shape and Hamon, but as others said, it would be better without horimono;
The one by Ikeda Ryuken Isshu has a tokuho certificate, but I worry that the boshi runs out of the kissaki; but I'm not 100% sure that is the case based on the pictures.
I have no idea about the resellability of either blade, but as a collector perhaps you don't care that much. What you might ask from a collectors perspective is: "can I get something better for my budget?"
For that question you should define what "better" means for you. For me the weird horimono and the possible boshi problem would be a pass, but if I had to pick I'd go for Nobuie.