Visited the Weaver factory. They pulled an employee from her regular duty to give my wife and me a tour. They only print and assemble the cars there. The plastic is shipped in all ready molded. They did have a section where they wire and assemble their engines, again, with the parts shipped in.
They have some items for sale but not really discounted. I have had a few Weaver cars. There was a coupler issue with one or two (failure to lock closed) but they sent me new ones.
In string of boxcars, my "special interest", they are virtually indistinguishable from other brands as they roll by. Up close they are just a little more lacking in detail, but not enough to make a difference. Well worth the price differential.
My wife bought me a NP cleaning car with two turning rotors based on a weaver outside braced wooden UP boxcar... I haven't used it yet as my new layout is just being built but it looks good and the construction is solid.
My advice to you is to definitely buy the Hershey car. If you like it you are in. If you don't it is only one car. (I'll buy it back from you) Good luck in your decision.