eBay and Craigslist finds

You'll be fine.

One of the official Pro-Lite retailer has been shifting 5 used sets at £299 with used tubs so it doubt this will go for more.

http://www.ebay.co.uk/itm/PRO-LITE-ROSA-CARBON-TUBULAR-50MM-RIMS-WHEELSET-TRACK-FIXED-1-2x1-1-8-used-/190950375930?pt=UK_sportsleisure_cycling_bikeparts_SR&hash=item2c758781fa

They still sell new ones straigh from the factory for £299+£60 postage: http://www.ebay.co.uk/itm/PRO-LITE-ROSA-CARBON-TUBULAR-50MM-RIMS-WHEELSET-TRACK-FIXED-1-2x1-1-8-15T-16T-/190900465507?pt=UK_sportsleisure_cycling_bikeparts_SR&hash=item2c728def63 and you can 'best offer' - import taxes should be circa £30.

I have Campag Pista wheels which are already too good for me so won't be bidding.

Ill check that. To be frank didnt decide what wheels to get to upgrade my Mavic Ellipse - may actually stick to them for another season ...