I have absolutely no information on a Crosman model 143. Are you sure it isn't a model 140 or model 147. I even searched the net and can not find anything on a model 143.
The Crosman Recruit is a pellet rifle not a pellet gun. If you want to see how the rifle is assembled then see the link below for the diagram.
If you want a estimate of value you will have to give more information, like the condition of the rifle Excellent to Poor, is it still working or does it leak air. What caliber is it? .177 or .22. Without more information it is not possible to answer you.
Benjamin (Owned by Crosman) has a new Benjamin Rogue it is a .357 caliber. At present it will be the largest Pellet rifle made with the Benjamin name. Yes it is a hunting rifle. The next largest Benjamin rifle is the Benjamin Marauder .25 caliber. Sam Yang make a 50 caliber and a 44 caliber hunting air rifle.
The Crosman model 120 was made between 1952-1954. The has a fore arm pump and shot a .22 caliber pellet not a .177 common pellet. The .22 caliber pellet was loaded through the loading port at the rear of the barrel. .22 caliber pellets are still available through most sporting good stores. Actually it's a very nice rifle.
the Crosman Model 400 was made in two variations. The first was made between 1957-62 the second was made between 1962-64. It's a .22 caliber pellet rifle. Without more information about the condition of the rifle it is not possible to give you and estimate of value.
If you are asking about the 2200 Crosman Magnum air rifle then it shoots a .22 caliber pellet not a BB.
Crosman and Daisy made air rifles for Sears under the JC Higgins name. Yours is a model 400 Crosman. However you did not state the condition of the rifle so no estimate of value can be given. However yours was made between 1957-64.
See the link below for the Owners Manual for the Crosman 1077 air rifle
Around $100 in good condition.
This rifle was made for sears by Crosman. It really is a Crosman model 400. Crosman has most all their Owner and Parts manuals online. See the link below.
The Chinese B-3 is rated at 450 FPS by the Manufacture. This is considered to be slow in the world of .22 caliber air rifles. As an example the Hatsan model 95 fires a .22 caliber pellet at 800 FPS and a Crosman Nitro Venom fires a .22 cal pellet at 950 FPS.
It's a Crosman 764sb air rifle.