Something unusual/unique/quirky? No...
Something that, in typical Oxford fashon, can be churned out in multiple liveries and sell by the train load to collectors? Yes...
Something where the the existing models leave room for improvement and if done right will also sell in quantity to the more descerning modeller? Absolutely...
The wagon makes a lot of sense as a basic item to establish the brand in the market, and to stay in production as a 'bread and butter' product that will continually sell...