In my opinion, you should get the used SW77 and then rig up some sort
of stealth antenna. The SW77 is a better receiver than the 7600GR. I
own both and the difference between them is significant--at least where
SW is concerned. In particular, the SW77 is much, much better than the
7600GR on SSB, largely because it permits smaller tuning increments.

Once you have your SW77, go to radio shack and buy a spool of very thin
magnet wire, which is hard to see. You should be able to make a decent
stealth antenna this way.

The AN-LP1 antenna also works well with the SW77.

Good luck!

Steve