i actually went on the last day during the last sale, and i was thinking maybe that was the reason everything was so discounted (i think they make further markdowns the last day). i think it is definitely worth going if you are interested in other Tory Burch stuff (i found this summer's sequins fish stuff, platform wedge espadrilles, and the khaki military style jacket, for more than 75% off during the summer), although i doubt you'd be able to find the reva flats by then, if they carry them, since they are already in high demand at retail.
i called trb a while ago and they told me they would never go on sale- they're just too popular. they were selling very high on eBay for a while (i sold a gold pair) but now people are barely getting over retail. i assume they're easier to find though i doubt anyone is selling them for less than retail.
i went to the trb sale the last tie and got lost on the way and then by time i got there they would not let me in :( i will try and go this time. she's one of my fave designers.
Tory Burch sample sale had the reva flats for the first day only, for $95 i think (they didn't have any left by the time I went on day two... but they did have high heeled pumps with the same design at the toe, and suede knee high boots for $150, among other things).
Only a free shipping code if you buy them from toryburch.com...TORYFS. When i bought my first pair from the site, they did send me a 15% off next purchase coupon with the Revas, which I promptly used on another pair. Good luck!