Reference for Bava Metzia 145:3
מאי טעמא רב פפא אמר ניחא להו דמגלו להו תרעא רב אחא בריה דרב איקא אמר ניחא להו דמוזלי גבייהו
without fear [of incurring the guilt of usury]. Why? — R. Papa said: They are satisfied by being informed of the market price.<span class="x" onmousemove="('comment',' For through the ready money they thus have in hand they are recognised as traders and receive credit, and this is ample repayment for their labour of bringing the provisions at their risk from one place to another (Rashi). Tosaf. in name of R. Han.: They are satisfied by being kept informed, by those who advance them money, of any rise in the market price in the dearer place during their absence, and thus aided in their sales. ');"><sup>5</sup></span> R. Aha the son of R. Ika said: They are satisfied with the extra discount they receive.<span class="x" onmousemove="('comment',' [In consideration of the fact that they supply the produce in the dearer place at cheap rates.] ');"><sup>6</sup></span>