just like the subject says, buying high q seeds (send pms on quality) and q180+ coal, will negotiate the price.
carrots 180+
flax, hemp 100+
barley 80+
poppy 70+
pumpkins 60+
grapes, hops 50+
offering high q metal, wooden, silk or clay crafts (ex. q120 steel swords, q80 tanning tubs, q80 druid capes, q70 tree pots, and more)
send pm to negotiate the price, have more to offer and discuss.