$4.92 today at my supplier here in Edmonton. Leviton's are the ones I prefer. I add them on to the estimate for the kitchen remodels. It's about am extra $20.00 and I mark them up to cover the usual costs of storage, transportation, and time. The end outcome for 4 5-20RA's works out to an additional $55.50 to the customer when I buy them in quantities of 100. The old split duplex 15 amp ones cost the customer $42.50 before the code change and I haven't had any complaints from anyone on the estimates, after I explain the 2006 code requirements.