Here is a list of the bottles in the Buffalo Trace Antique Collection and the prices seen in the UK.
George T. Stagg (70.3% ABV Fall 2006 and 72.4% ABV Fall 2007) - UK £100 (3.5X US price)
Sazerac Rye 18 (45% ABV) - UK £70 (2.5X US price)
Thomas H. Handy (66.35% ABV 2006 release and 67.4% ABV 2007 release) - UK £85 (~3X US price)
William Larue Weller (60.95% ABV 2006 release and 58.95% ABV 2007 release) - UK £90 (3X US price)
Eagle Rare 17 (45% ABV) - UK £61 (2X US price)
I have found each of these on store shelves this year in the US for $55-60 USD.
Perhaps you guys are closer to the reason of price gouging, but I just didn't realize that Bacardi 151 was in such high demand in the UK.
Possible reasons then:
1.) Retailer Price gouging/Unfair trade
2.) Import/Transportation fees
3.) US Distibutors gouging the foreign markets (UK and Europe in this case).
4.) Supply and demand
I suppose it can be any of them, but I'm sure the more input we get on this thread, the closer we'll be to the answer. In the meantime, visit the US, and pick the bottles up here for less.