Keh,
My theory is that the lack of participation in the tailsuit section of the classifieds is the result of the very low turnover rate of tailsuits in general. This sorry state of affairs is not all bad, though...while it's hard to get a used tailsuit, once you get one (used or new,) you can use it until you outgrow the darn thing. So while it's likely to be a bigger investment up front, I think you have a good deal compared to us ladies, who must change dresses periodically, going to a good bit of trouble to sell them at a loss.
Don't get me wrong. I sympathize with the plight of the male student testing the Standard waters, not wanting to spend a fortune. (I teach some of those myself.)
If anyone has alternate theories on this subject, or suggestions on finding used tailsuits, I'm sure many men would be interested.
-Melissa