can I sell my sites

fellow warriors,

I have a load of sites, amazon product sites, they all have great reviews on the products ie 1000 words plus,
they are all good exact match domains . and they have some articles also
alot of them are tv hd sites , camera sites , laptops , tablet sites ect.

I set them up 2 years ago and they made a little bit of money some of them,
I want to sell them because I never had the time, I got into this amazon maketing when you could just build and leave it, well that was the way It was meant to be.
but I never had the time to promote them , i did very little backling, no link blasts or anything like that , just blog commenting that i outsourced and not much at that,
I never had the time to add more articles on a regular basis, and that seems to be the key , more content and linkbuilding,
so Im thinking of selling them and wondering if that is possible,
I know of flippa, but dont you have to pay 30$ to flip them ? and arent sites meant to be turning a profit to be sold , ?

how can I know if these sites can sell, i really feel that a good marketer could make these work.

any suggestions would be great, anyone know how to value a site

all the best stas