As with any firearm, it is not possible to accurately appraise a gun without seeing it. Condition, and original configuration will determine value. Other factors such as rarity of caliber or guage and higher grades have significant impact on value. Recommend that you see a local gun dealer for an appraisal. You can also do your own investigation by looking at other models being sold that are in the same condition as yours. Try the gunbroker.com or a periodical called "The Gun List" You can also reference the Blue Book of Gun Values which can be purchased on line at various retailers.
Nothing. The B2000 wasn't made until 1974.
400 or so
350
It varies by condition, length and choke. Try the barrel exchange. Most of their B2000 barrels are around $300. Keep shoping online at the gunbroker and other gun parts outlets. http://www.barrelexchange.com/
Your B2000 in 95% to 98% condition would probably appraise between $300 and $350. A mint B2000 with box would be valued near $400.
Browning B2000 shotguns in nice shape can be readily bought for under $500.
Browning offers letters
100-700 usd
Several, the auto5, B2000, B80 and others
Try egunparts.com, gun shop, gun show, pawn shop
Go to a good gunmsith.
B2000 aren't worth a whole lot. They are a good shooting but unpopular. I have an old one but would be interested in yours if the price was reasonable. What barrel does it have?Dan Fisk 714-305-3800 or danfisk@aol.com