I went to a Serta Showroom in Jurong Point yesterday. The sales person told me there was a promotion for all models of mattresses. Eg: Serta Diamond Suite was originally sold at $5k+ now going for just $2699. Is it true? Is this model really so expensive normally? Or is Serta just trying a marketting gimmick stating a way ex original price when normally the prices are just $2k+?