Ted S posted:
@Dj'sOgaugetrains I'm pretty sure the I-12 is a bay-window caboose based on a B&O prototype, not a steam locomotive. They've been made before. You might be confusing it with the I10 designation for a PRR Decapod (which have also been made before ;-)
The I-12 wagontop B&O caboose would likely sell pretty well, as they seem to go for a premium on eBay. I have one already, and think its a well made model.