Heh. I was going to do that and they said right in their listing "we don't disclose our reserve price."
Ok, I'll set my best price on a snipe. Thanks! Keep your fingers crossed for me!
I am pretty brazen with sellers like that, and email them to inform them that if they want my bid, it would be more likely to happen if they were to disclose their reserve price.
I usually say it in a nice way that still gets the point across:
"Hello, I realize that you are in no way obligated to tell me the reserve price but I have my own policy of not bidding on items with a mystery reserve price.
If you would kindly consider telling me what it is, I will be able to consider giving you the price you would like on this item, which saves me the trouble of playing a guessing game on a mystery price, and saves you the problem of being hit with a fee and left with an unsold item if no one meets the reserve price. A win-win for both of us.
Best regards, your potential buyer."