Missing the pickguard, knobs and original case does bring the value down. Here's a mint example for sale.
Non-original case, but otherwise - wow! Price is high at $1,950, but you don't see these in this condition very often.
Owning a vintage Longhorn would be great, but personally I found it very hard to let that kind of money go for such an inexpensively made instrument. A couple years ago the new Danelectro company released a "dead-on" reissue. Those were $350 new. Made in China, but they were so close to the real deal that it was irresistible.