How much is my Lego set worth?

[Bjaman]

I have a Lego set from 1985. It's unnamed 1968 with 177 pieces. This was a closet find. My dad was selling our farm which has been in the family for over 100 years. Upon cleaning out my moms closet (she passes away in 1989 when I was 7) we found 2 Lego sets unopened still in plastic. My father confirmed they were for my older brother and myself for Christmas but they were forgotten and we never got them as gifts. My oldest daughter loves Lego and opened up this set behind my back. It's now considered used and not new. It's still mint. What is one of these sets worth? I don't know how to add pics. http://brickset.com/sets/1968-1/(Unnamed) This is the set I have.

[Brick & Blue]

According to Brinklink it's worth about $110 used, but if the box is in good shape then maybe $150. It's a shame that is it was opened, otherwise you probably could get $200+ from some crazy LEGO collector.

But you said you found two sets in the closet, I'm curious to what the other one is.

And it sucks you have to sell the farm.

[Bjaman]

The other set was the exact same. I listed it on eBay. I had someone offer me $120 for it.

[lego the hutt]

Here is the bricklink listing for it: http://www.bricklink.com/v2/catalog/cat ... 020#T=S&O={}

Find one in a similar condition to compare (though there aren't a lot for comparison and you never know how long some of the higher priced ones have been sitting there unsold). It is a place to start anyway.