These all seem like limited run prints, what do you expect. Indie games are bought generally via PSN aside from these limited runs. But they don't seem to have huge widespread appeal/value, I could only see games without a digital presence having any real value on PS4 in the future, maybe some limited editions that have really cool extras people desire. Since the PS5 will be backwards compatible, it is likely most of the digital PS4 titles will be readily available for many more years to come, aside from titles with short sighted licenses like some of the racing games.