Which wheels to choose?

Cranks, so why are the Open Sport on Ambrosio hubs in your example worth £72 more than the Open Sport on Zenith hubs from eBay seller?

Or do you actually use buttons as currency where the difference wouldn't matter so much?

Why you asking me that question? Maybe the ebay seller has lots to clear? I don't know - ask them!

I posted the velodrama site as a suggestion for wheels to look at, as requested by Betty. Thats what this forum is for.