Wanted: cheap compact crankset & BB

Notice that decent cranksets often go for cheaper than expected on 'ere when in beater condition. After something like this relatively specific and cheap, so not in a hurry, but here goes:

• Ultegra/Rival level or similar (maybe 105)
  
• GXP or Hollowtech II
  
• Ideally BB included
  
• Compact (110bcd)
  
• 68mm BSA
  
• 170mm ideally
  
• With or without rings (will be running as a 1x with the small ring anyway)
  
• Max £50ish
  
• Cosmetic condition completely irrelevant but threads, splines, bearings in good condition