I agree the 460 is the pick of the lot. Mainly b/c I think the 728 will either go for alot more than the current or will end up staying under a high reserve. It is a sweet handbuilt Reynolds frame and should draw bids even though I'm not a fan of half-step gearing, even with a granny.

The 460 will, I'm pretty sure, draw more bids. Older Treks have a following and this one looks real clean in a popular size. I don't know if you're an experienced e-Bayer but this bike may well introduce you to the lovely world of sniping. If you know e-Bay you know the drill, if not I'd go ahead and submit your max bid a minute or 2 before the end and if you get last second sniped, c'est la vive. There's more classic bikes.

If it happens more than once, there's brands besides Trek that'll give you the ride you want and don't attract as much attention.

Good luck!