Read randomly, this is a decent manga on all parameters. The story while in the same Isekai category isn't really generic? There's a lot of unique factors which make it different or worth reading. MC dude is fairly experienced on all parameters while selling stuff from the original world and being an adventurer. That's it really, his lack of common sense is compensated for a well crafted story. Sometimes the better stories have simpler plots, here it works quite well. On a bonus note, his way of using "guns" is cool while being very different from just pulling them out and firing