I can understand weapons being overpriced. But other than charging you for it, i wonder if it would've helped if he had went into the store and like "Can we stay here for a bit, i think someone's falling us/trying to rob us" and maybe the owner would've fought off someone, or at least call the guards but i assume 'phones' don't exist yet unless they have 'magic communicating crystals' or so lol (tho i would hope the town would be safe enough not to be openly attacked versus an 'accidental bump and pickpocketed')
If not trading sugar like "give me a cheap set of armor" or so but i guess other than oddly dressed in modern clothes, coming in with two slaves might not make you look rich. Or maybe not 'acting natural' b/c i can imagine other than carrying stuff out ppl 'normally' make their slaves wait outside lol