Thanks to the OP Villager Trades mod, you will be able to improve the standard deals with rural merchants in Minecraft for Android. Agree, giving 6 emeralds for an iron pickaxe is theft, worse than utility tariffs.
In Minecraft on the phone, almost all the offers of merchants are like this, because the author of the mod decided to fix it.He made five levels of trading in MCBE, which can be developed by contacting the seller over and over again. As a result, you will open access to the coolest items at the lowest prices in the game. You can even get an item with a special enchantment!
No magic, just a useful mod OP Villager Trades for Minecraft BE. You can also use it on your maps. Have a nice game!