Seems high, saw one in WV sold for $10,000. 2005 F250 4WD 12v, 5R100, CCLB. I shoulda snatched it up. I mean the part of the price is the $1500-2000 in adapter plates and stuff. Not to mention trans control and hoses, etc. So with a 47RH you have almost none of that cost and many would say a undesirable transmission.
Do you have facebook? Fummins page has them for sale all the time. However turn key on there means EVERYTHING works perfectly. Lots of stuff sells cheap needing the small stuff.
Ebay had a 2008-2010 with a 6.7 Cummins, 5R110, F350 DRW 4WD King Ranch for $28,000 in Canada. A 2004 F450 with a flatbed just sold on ebay with a ZF6, VE 12v, 19.5 wheels, 4WD and a little bit of rust starting for $12,500 I think.
Hope that helps. I wouldn't think a 2WD F450 with a 47RH would be over $10000. A 2WD roller is worth $5000 maybe? Add $325 motor mounts, a cummins motor and trans, do the driveshafts... I don't see $14,000.