Airing PM's in public is not a good idea... they are PRIVATE messages and should probably stay that way!
From the pictures its hardly conclusive if it is a 52 or 48 throttle body, I can't see any Part numbers in either picture... plus whats to say you havn't swapped them over already and are just trying to get something for free like the BMC? - By no means am I saying you did, just whats to say you didn't?
Sorry if this causes offence or anything, it wasn't meant that way... Just everyone always forget that sellers get conned sometimes too!