Condition is everything when it comes to value. That being said, the Blue Book of gun values says one in 100% condition (As New in Box ) == $ 395, 90% =300, 60% = 225
50-110 or so
$25-$175, depending on model and condition.
25-150 USD or so
That is the serial number- not a model number. Try again.
No way to tell.
Blue Book of Gun Values
10-130 usd
Have you tried a web search? Local Library? Do a web search on Harrington and Richardson Books and you will find some sources.
Harrington & Richardson did not make a Model 1900. Hopkins and Allen did.
20-140 usd
More information needed to determine model of firearm.
"BB" prefix indicates 1985