The prop collector here. I had decided to do a bit of bidding on the waistcoat but the character factor made the costume go up way too high for me. The characters are usually of greater importance than the actors.
If you look at the official Parallel Film auction held in 2009 where a whole warehouse full of Kingdom props was auctioned off, all costumes of the characters including Peter Kingdom's (Stephen Fry's) costumes sold for around £500 altogether.
And then there's this single piece of costume worn by Jeeves which is not even part of Jeeves' main outfit and it gets sold for $350/£193 (£241 with buyers premium included)!