BTAC prices have gone crazy in the last couple of years. This year, the only places that had them near me had them listed at more than $500/bottle. I was paying $75-89 2 yrs ago at these same places. (They were even higher on Pappy - to the order of 10x retail. A representative suggested that I call the Attorney General regarding the price gouging)
I've actually never tried Blanton's.
I'll shoot you a PM with a place I've had good experiences with.