please, don't throw them away. amiga is not something to put into thrash. You would really regret doing that some years later. Here in japan, I saw an amiga 500 system go for $500. they're not being produced since late nineties, so they becoming rare items day by day. please have some patience, and you will have a good reward some day. just put it in the attic, make sure it doesn't dust, because it decreases the price it will fetch.
here is the link to the $500 amiga auction page at yahoo japan auctions.
http://page8.auctions.yahoo.co.jp/jp/auction/h26894633