What is value of Marx Electric Train model 14868?

It is all about condition. Louis Marx toy company, did not use any particular freight car per set number they were so mass produced that you can see them surface by the hundreds in various conditions ranging in a price range from 1.00 to 25.00, but if you have a complete train set 8994 in mint condition including a mint box with all inserts and all original supplied set parts,track transformer and complete train with mint lithograph, it could fetch up to 300.00 dollars. but i have seen surviving sets in various conditions go for 50.00 to 150.00, in like a c6 condition. that being said it's most valuable if you keep it and enjoy the toy train history that you own. Hope this cleared up you curiOSity.