You'd be surprised at how cheap some stuff goes for late in the auction...I've noticed a huge trail off on prices when I've entered stuff in the auction. Plants that went for 15-20 early, will for go for 3 or 4 late.
Getting there at 3 is a good move if that is all you can do - the auction is many times bigger than what is available at the monthly meetings.
180g - Tropheus Bemba, Syno Petricola
125g - SA Community, Geophagus & Acaras
75g - Planted community