How to determine age of HO accessories

[R499]

I have the following Bachmann accessory still in  the package:  2302:175  Motor Truck Set #1.  I'm just trying to figure out how old it is.  Have tried googling it and came up with another Motor Truck Set #1.  Mine has a green tow truck and 2 northAmerican Van Line trucks.  Any ideas?

[rogertra]

I've no idea what you've got but if you are fishing for a value, probably around $0.00.

Just because may be "old", doesn't make it valuable.  Especially of it's older Bachmann.