Here is a my dilemma. I looked at an eBay auction of the following:

Used MAVIC / SHIMANO ULTEGRA 600 WHEEL SET
* Auction Includes Both Front & Rear Wheel
* Auction Includes Shimano Ultegra Hiperglide 8sp cassette 12-21
* 700c Clincher Road Bike
* Front Skewer Included
* Shimano 7/8/9 speed Compatible
* Hubs are Shimano Ultegra 600
* Spokes 32 Front & Rear

These wheels sold for $96 delivered. But I really don't know enough about wheels to determine what is and isn't a good deal, given that it's a commuter bike that will see a lot of bad weather. The bike has a Shimano 7 cassette, currently.

Here's another set of wheels that seem like they will sell for very little:

# Wheel(s) Make = Weinmann
# Wheel Model = DP810
# Wheel Size = 700c
# Tubular/Clinchr = Clincher
# W. Spokes Front = 36
# W. Spokes Rear = 36
# Hub- Front = Shimano
# Hub- Rear = Shimano

How do I figure out if they are an improvement? I can't even find out specifications for what these wheels weighs. Also it appears you can use a spacer with a 7 cog cassette on these wheels, but where do I find them?