The auction is now for 6 pieces. In total 4.5 watts - cheapest 4.5 watts on ebay!
These are nice educational Anamorphous Solar Cells. They are glass backed which makes them nice to look at. Being amorphous they are great under less than ideal conditions (cloud, indoor incandescent light etc) compared to Mono and Poly cells.
They are 66mm X 66mm with two connection points on the back for wires or linking together
Under 'working load' they produce 1.5v (just over 2V open circuit) and 500ma of current. You could use one cell to charge one 1.2v AA NiMH quite easily. It would charge it in around 5 hours of good sunlight.