[Repair] Since the Skill Has Become a Versatile Cheat, I Think I Will Open a Weapon Shop is a Manga/Manhwa/Manhua in english language, Seinen(M) series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

It’s hard for Luke to make a name for himself as an adventurer with all the competition—especially when he’s a perpetually low-ranked adventurer whose only skill is [repair]. But when Luke is abandoned by his party and uses that same [repair] skill to survive and escape the dungeon, a new world of possibilities opens up. Suddenly, his despised skill allows him not only to survive but to stand out in a crowded field!