Temimut is its own reward
Rebbe Yisrael of Ruzhin zt'l related the following story: A G-d fearing man sold furs from his home for his parnassah. At one point, business was slow, and he was sitting with many furs in stock. Early one morning, someone knocked on his door and said he wanted to buy all of the furs. But this fur merchant hadn't yet davened Shacharis, and it is forbidden to do business before Shacharis (see Shulchan Aruch, Orach Chaim 89:3). "Come back in an hour, and I'll sell them to you for a good price." "No. I need them now. If you don't sell them to me right away, I'll go elsewhere." His parnassah was tight, but halachah comes first. So he quoted the goy an exorbitant price for the furs, figuring that the goy wouldn't pay so much, and he would leave. But the customer was desperate and agreed to that price! The yetzer hara told him, "You can't afford to lose this deal. It is a miracle! He is willing to pay double the market price." ...