Ah, yeah, 5th edition doesn't really want magic items to be purchasable so there's very few listed prices for anything magical beyond healing potions and low-level spellcasting services. There wouldn't be much to find in a frontier town like Phandalin anyway; the only wizard anyone has seen recently is Sildar's contact Iarno and you already know he went missing. Healer's Kits are available though and good in a pinch