I have a l96 sniper with 500 fps I bought years ago for $150. I'll sell you it for $20 + shipping. I'll include the bipod, extra clip and whatever extra accessories I have for it too. It's in great condition besides a few scratches on the black paint on the barrel. Spray paint will easily fix it.
I would loving love to see pictures, and would almost certainly purchase this.
I live on a few acres in a valley, with my property running up a mountain. We have tons of trees and some small fields which make an excellent arena for this type of faux-combat.
I currently own this:

and this:

I have had tons of fun playing Airsoft with friends who have similar load-outs, but I have never been able to achieve a great distance of accuracy with any of my 'toys'. I definitely need to upgrade to a sniper class setup.

Cheap, but it's cool. Can get this thing for +$80, mate. B))
This thing looks pretty cool but it said 'out of stock. '
While I personally don't have it, this seems like it'd be a good starting point, and is within your price range by itself at a
Like in most cases, you'll probably want to change out the bi-pod and scope to something more to your own liking.
The one you linked looks nice, if I don't end up buying Ravencroft's I'll consider this.
Can anyone recommend a place to purchase high quality airsoft bb's for these types of guns?