Spatz Target Pistol

I recently picked this target pistol at a garage sale. It has a pamphlet with it that is created by the Lunde Arms Corp. It is in perfect condition, but doesn't come with any ammo. It has a look of a colt 45, but smaller. The only info I could find on it was that the company went bankrupt after they were sued for selling these guns through mail order in the 50's. It looks like a toy, but the manual claims that it really shoots!

Can you tell me what this would be worth?

Thank you. Melanie