"These sell for between $500 and $1000 depending on condition, marks, and the buyer."
Uhm... try adding a zero on the end of each figure and you'll get a lot closer to what a Winchester Model 12 trench gun can actually bring.
$500 for an authentic Model 12 trench gun would be the steal of the century.
That, of course, is predicated on whether the gun is authentic or not. Trench guns, especially the Model 12s, are frequently faked.
"The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza
Baby Jesus cries when the fat redneck doesn't have military-grade firepower.