It was true that it was tempting to obtain in an instant the experience and know-how of a craft or art that would otherwise have required years of apprenticeship. However, this was normal human reasoning. There was one major difference between his former self and his present self: His stats.
What would have required thousands of hours of learning and revision in the past could probably be accomplished in record time with his present Intelligence. If so, was it still worth paying a hundred credits for knowledge he could easily learn on his own?
Whether it was a martial art, biology, cybernetics, or any other field of expertise, if a normal, motivated human could do it, it was probably extremely simple for him right now.
By the end of the Ordeal, his swordsmanship had surpassed 70 points and the majority of these points had been earned over the last few days as his intelligence grew.
I couldn't explain and show you everything about the Oracle Store, but you'll know more once Jake reaches an Oracle city.
If you have any questions about the rewards please feel free to ask the questions in comments. I suspect some people will grumble ^^
The popularity ranking has also been published in an auxiliary chapter so be sure to check it out if you're interested. ;)