eBay problems, resolutions, shenanigans, questions and info (not bike finds)

Double posting a bit, but this is the relevent thread:

• I won an item on eBay for ~27 quid, well below it's new value
  
• The seller hit "cancel sale" within minutes of the auction ending with reason "i have sold it to someone else"
  
• I emailed him asking what was going on, but he has not yet responded (but then it's not been that long)
  
• Is there any point in saying to him "no, you committed to sell it to me, where is my shower door?"