Immovable rods. Fun to macgyver with. Also, bags of holding and portable holes. Also fun to macgyver with. Vials of acid. Etc etc.

The best combination ever? Ah, Schrodinger's Haversack. You put coinage equal to the value of some commonplace item in a little purse in the side, and the probability of the useful item you are thinking about being inside it goes to 1. Avoids the "I have a 12.5 foot pole!" "No you don't!" "Yes I do!" entirely. Also does simple non-masterwork weapons.