How much do things cost?

To replace a 1968 dollar with a 2012 dollar you'd need about $6.50.  Somewhere in the Watergate info I've read over the years, there a was a bit of about Tricky and his henchmen rewarding a donor with a good ambassadorship.  The guy gave them $250, 000, I think he got England or a comparable spot.  What I wonder is has the cost of buying an ambassadorship stayed even with, lagged or exceeded inflation.  How much did Bush charge?  How much has Obama charged?  They should be going for $1,500,000.  Do they?