Like you said (don't hate me).
Don,
What you're asking for is a moving tartget. If you've been on this forum for long than perhaps you know that most of us buy our Lynx Express from group buys. Those costs are based upon the price of the parts AT THAT TIME. There's a lot that goes into it.
Now, if you buy it from someone here on the forum, generally speaking most will sell it to you for what they paid for it and some will discount the price based on use and or how badly (quickly) they need to sell.
That said, You can build a Lynx Express for approximately under a hunred dollars. If you buy it from someone already built and depending if it's in a case with cords the price can be as much as $30-$50 dollars more depending on the materials they used to complete it.
Hope that helps.
(Sorry,.. should've read all before commenting and noticed you're new here) I hope it helped anyway and Welcome Don!