Current Projects chat and miscellany

So I have these two seatposts

One is a Campag, 27.0 that came off the Raleigh and was destined for the Rourke:

The other is a shiny, but mediocre UNO that came off a new Dawes Galaxy and was on the Rourke and is destined for the Raleigh:

I think you can see what the problem is...the Campag is 27.0 and the UNO is 27.2

What confuses me is that the Rourke is 653 and the Raleigh is 531, so both should take 27.2 seatposts, no?

Anyway, questions for you lovely folk:

• Can I use them the other way round (i.e. 27.0 in the Rourke and 27.2 in the Raleigh)?
  
• How much is the Campag post worth?
  
• Does anyone have a Campag (aero or not) 27.2 post for sale?
  
• Does anyone have a beater silver 27.0 post for sale?
  
  
  

The issue here is that the Rourke deserves a Campag seatpost to complete the groupset and the Raleigh is a beater, so I don't want anyone taking a fancy to any of the parts.

Which reminds me, I'm also trading/ selling the Nitto Stem on the Raleigh..

Thanks!