By "original" do you mean the 1981 printing? If so, that seems to be popular with collectors due to the supposedly superior paper/printing quality. I know there was a copy of the same deluxe signed slipcover version (ca. 1995) that I own up on eBay recently for around $350. But it did not sell so no confirmation if that's the going price. I think it went for $225 originally.
By "original" do you mean the 1981 printing? If so, that seems to be popular with collectors due to the supposedly superior paper/printing quality. I know there was a copy of the same deluxe signed slipcover version (ca. 1995) that I own up on eBay recently for around $350. But it did not sell so no confirmation if that's the going price. I think it went for $225 originally.