I have a feeling that I may have once traded these chips, as the Westcliff is my local, but if anyone is interested in them, I would suggest $10 is a good price :

Stakis : No longer exist, but chips still used at several Gala casinos (who took over the casinos)
Ladbrokes Sporting : Based in Tottenham Court Road, London and also now a Gala, but uses Gala chips - first time I've seen one available since all my traders went!
Westcliff : All current, but the hot stamp chip is almost impossible to find in good condition and this one seems nice - the other 2 are easily obtainable
Waterfront : Now closed, but this chip is used in the Westcliff casino as the foil centre activates the progressive light on the Caribbean Stud Poker tables (although starting to get hard to find them in nice condition!).

Some more details are available on my website.

Good luck with the auction

Jason