50-100 USD
They sell new for $125.00
The Harrington Richardson Topper 12-gauge model 88 shotgun is not worth a lot of money. There are quite a few for sale online for $75 to $125 depending on the condition. This is a pretty basic gun with no pizazz.
1901 single barrel shotgun, washingtion
About $70, depending on condition.
The Harrington Richardson 20 gauge single shot shotgun, Feb. 27 1900 is valued at $75 in poor condition. In good condition, it is valued at $200.
$100 to $110 in excellent shape
Harrington and Richardson made the gun you asked about. They are a basic no frills gun with a good reputation. The company has been around for a while... http://www.hr1871.com/about/default.asp
Made through the late 1940's - mid 1950's. Value under $100.
Seek the services of a good gunsmith
Depends on what it is choked.
Under $100.
50-150 USD