What is the most expensive gift in FarmVille?

it's the mansion which is 5 million farmville coins

if you're asking on farmville cash it will be the deluxe lodge and that is 69 farmville cash

for animals look for the bird name pheasant that is 2 million farmville coins

for vehicles it's the hot rod combine and that is 110 fv cash

the best seed to plant to earn fast xp so your fv cash can grow and coins can run up faster is peas but you gotta reach level 32 to start using this type of pease so save your fv cash and fv coins till you reach level 70 so you can one shot buy the mansion and the expesive pheasant and the deluxe lodge and so and so, lol