Yurt picked up the knives, testing their balance and sharpness. He had a keen eye for detail and could tell these were functional, though not particularly fancy. More for hobby use than for hunting or war. "Hmm... I'll give you 6 denarius for all three." As you went to get a bow and quiver, Yurt gathered a few bundles of arrows for you. Nothing fancy: basic iron tips, light but sharp.
The difficult part would be getting a good enough bow. The cheapest ones you wouldn't even want to use for hunting: they lacked the strength to put any meaningful force behind the arrow, and we're best left for training. You would find a good one for 20 denarius: it was a full bow, not quite as big as a proper longbow but certainly better than your current shortbow. Took a bit longer to draw but the range and power you can put behind it would be well worth the cost.
"Let's see, with all that, including trading these knives, will cost you 30 denarius. Anything else I can get for you?"