If you are shopping for TB clothing then the sample sale is usually worth it a sthere are always actual samples and current stock. There are usually lots of Lidia polos and Simone cardigans. For everything else, your best bet is to shop now. Sample sales normally carry at least 2 seasons past of old stock in terms of accessories. I can't imagine the upcoming one would be different. I'm pretty sure you will see Amanda bags, Penn totes, Kerrington totes, Roslyn totes and certain styles of Robinson. It's anyone's guess for shoes.
If it's a sale to benefit Tory's Foundation then that's entirely different and totally worth going to.