This is a piece of Star Wars history and it is up for auction. The DL-44 Blaster used by Harison Ford in the show is expected to fetch more than $200,000.

The gun is non-firing but was used in many scenes featuring Han. The auction is being held in Invaluable. They explain:
This non-firing blaster was created for The Empire Strikes Back and was also used in Return of the Jedi. It would have been used in the majority of scenes that feature Han, with the heavier, live-fire weapon being used for close-up shots. Particularly noteworthy scenes requiring this lighter version are when Darth Vader uses the Force to lasso the blaster out of Han's hand in Empire, and in Jedi when Han wrestles with a Stormtrooper to regain possession of his blaster during the Rebels' encounter with Imperial forces on Endor.
You'll want to look like this, I promise you: