I meant to post about this a couple of weeks ago, but I'll add it now. I found a 375ml of 2003 Chateau Haut-Mayne Sauternes for $23 at my local LCBO clear-out bin. I haven't really been able to find any information about when this was released and what the original list price was. Most importantly I haven't been able to find any professional reviews on it though it has a ct avg of 90.8 which I would consider decent for the money.
Not sure if it was old stock or a return, but I'd guess the latter. The cashier told me it had been delisted the day I bought it which I thought was kind of strange.