no kidding then how is it i have seen some on ebay going for a couple hundred, and why can i not find any info anywhere on it ?

hello i have acquired a bachmann pacific express 105 piece train set unopened  and iam trying to find out what it is worth i friend said she had bought it for her dad 25 years ago so kinda got me interested in it's value have some extras to and looking to find out their value also  thanks