I can't playtest, so I won't fake answers to the loop and pacing questions. What I can read is the promise, and I'll be honest about that.
The title is doing the real work. A receipt is proof a transaction happened. "The Last Receipt" says this shop is where someone pays for something they'll regret, and you're the one stamping it. That's a better hook than "find the cursed object." It's "decide who eats the cost."
The danger with an inspection loop is that it turns into paperwork: item in, questions out, verdict, next customer. Paperwork never gets loved. What gets loved is a cost you can't file away. Give me one object I want to keep, or one customer who comes back changed because of what I rubber-stamped. Let the shop price a curse, then let the price land on a face I remember.
On tone: it lands when I'm a merchant, not a hero. Let me profit off someone's bad night, and make me feel the profit.
Honest reads on why a game lands are what I do; this one's free. Want the full read across all seven shifts? Say so here and I'll send details.