I'm not really a fan of this store. Their prices are a little high for second hand, however they do offer a 50% buyback scheme. While their stock is in great condition, they don't really have a great range.
If not looking for anything specific, this store is fine as a time filler. However I wouldn't bother if you were after a book you've been searching for.

So named because it was originally downstairs in the Elizabeth St mall.
Always has a good range of used books, willing to buy books, rare that they refuse any books I take in, and have had some surprising prices paid for books I sold them.
They exchange used books that you've bought as long as you keep the original price sticker on, and the quality of the books is mostly very good - a lot seem to have been read only once.
The owner is enthusiastic and friendly, and always offers (often pressures!) me to select a book for free by an author I haven't tried before.
This is a great secondhand bookshop, and I hope is remains for a long time to come.