EBAY !!!! It's a good place to start looking to check an average price for sets in various conditions. As always list it acuratly and honestly ( trust me Lego fans can smell mega block substitute bricks lol ) You have some good rare sets here as I have not seen them on sale much I saw the the island fortress sell on ebay for £36.00 ( not sure the dollar value but around $70-80 ) Another site is Bricklink but this a sa fans site really and everyone knows what they have got and often over value it but again good to see values.
I definitly give your sets a look if i lived in the states lol :-)
