Well, understanding what your asking, these little garden guns were mfg. in 1920-1927, and approx 20,000, were mfg.
They are desirable, collectable and fun to shoot!
With that being said, when available in worn, yet shoot able condition, they usually sell between $400.00-$900.00 US American
Dollars, and as condition improves they can get up their pretty good, $ wise!
Anytime a Firearm is cleaned re blued, it usually de tracts from the Value!
Many Winchester Collectors will tell you to simply lightly clean with a rag and some cleanzoil,
and not to use Steel wool on it!
By Simply wiping it down with an oil rag, you won't hurt the value, or detract from the gun at all.
There's nothing wrong with an honest looking grey, worn, well used gun, that shoots well, and is enjoyable to use,
and Admire! JMO!
