Funny, I just bought one of these myself... To be honest I didn't know how much it was worth, but it was in really good shape (other than a strangely off-colour toe repair) and looked pretty neat. It came with a period appropriate Weaver scope on a side mount, which I later found out wasn't factory. I think a lot might depend on if the scope is the factory type and mount (see through, apparently), and the length. Mine's the short barrel boy's rifle. I paid $85 but that feels a tad on the low side.
I found the Wikipedia page on it useful to figure out some of this.
http://en.m.wikipedia.org/wiki/Winchester_Model_67
I'm not sure what the difference is between the 67 and 67A are though, if any.