a goodwill I have posted lots of trains over the past month. O Gauge and N Gauge seems to get the most, HO not so much. O Gauge is the bigger older train sets, seems that many will buy even the beat up set for parts and tracks. As for the N gauge, these are the really small train, that we usually get in good condition. I assume these are newer gauge and since they are small, works well for those with limited space to have a train set.