These half-size math models offer all the geometry at a fraction the price. 

Sculpture this size.	How are they made?

The Gyroid 1 3/8" cube - $65 Also at Shapeways
	Borromean Rings Seifert Surface 2" diameter - $60
Hypercube 2" diameter - $60 Also as jewelry, also at Shapeways
	The 120-Cell 2" diameter - $70 Also at Shapeways
The 24-Cell 1 1/2" width - $65
	Schwarz' D-Surface 1 3/4" diameter - $65 Also at Shapeways