Hey all....Look at those drums in that pic ... those plastics (or whatever) are all kinda destroyed ... so I was wondering what's the average price of those plastics ...if I were to replace them ??

How would you like to be an egg? You only get laid once. It takes 4 minutes to get hard, 2 minutes to get soft. You share your box with 9 other guys. But worst of all: the only chick that ever sat on your face was your mother. So cheer up...
The "plastics" are called heads. For a full set including the bass drum beater head it'd take about $100. Go to musiciansfriend and look around at the prices and read about the different heads.

EDIT: Unless you learn how to properly tune you'll either want a real drummer to put them on and tune them or you'd be better off just keeping those on. You can have brand new heads on 4,000 dollar drums but if you can't tune it won't sound any better than that set in the pic sounds now.
We're only strays.
get remo heads!
Dave Mustain has wrote some of the most amazing solos...
That he can't actually play!