Yesterday, Agent Provocateur began its summer sale on its sexy underthings such as bras, knickers, suspenders, corsets and nighties.  At up to 50 percent off the retail price:  bras are now going from $40 (Maschina bra) to $100 (Betsie bra);  corsets are priced at $400 for the Gretchen corset (was $790), undies are starting at $20 (Nikita thong) and Love briefs[...]