Forget D&D, if you want to learn about medieval economics this is pretty much the best practical guide I've found, with actual numbers based on actual calculations. Grain Into Gold will calculate the average yield in silver pieces from an acre of wheat in a year, once the farmer's had it milled and sold to a bakery. Want to know how? This little book will walk you through it, as well as textiles, mining, and more. It's edition neutral, works just fine in 5e.

Surprisingly glorious. The set up is super simple, it's a one-off two-page heist after all, but there is just enough depth, complications and obstacles to result in all kinds of hijinks. Bouncers plus city guards plus powerful but naked gladiator = hilarity.