You also have a 1934 crown up for sale on ebay -- one of the nicest I've seen. 1934 Crown Lovely isn't it! Your 1934 crown is already at four thousand with 7 days left on the auction. It may end up setting a new price record for this coin (if it hasn't already).
Rob...I noticed a posting on another collector website with a link to an article on this very subject. Looks like the coin is going to stay in the UK. Latest News
Like Rob, I also had not seen the advertisement, but I noticed the same or a similar advert on page 41 of the latest (February) issue of Coin News. He also has a 1642 triple unite and a gold 1797 Cartwheel penny.
This may be somewhat off-topic, but I have heard that a similar problem exists in the area of 19th century Maundy and currency issues whereas some Maundy issues are being offered as their rarer currency counterparts.
I actually tuned in on time -- but only because I wasn't certain of the time difference between here and the UK. Chris -- in addition to the call-ins -- have you ever thought of interviewing other dealers and/or collectors on the show?