Right now, PunchCad has a promo for $30.00 off using promo code PROV9. Expires: Jan 22, 2014.
Last month I picked up ViaCad Pro V7 for $45.49 shipped on Amazon (you can probably get it cheaper). The price to upgrade to ViaCad Pro V9 from any previous Pro version is $99.99. Minus the $30.00 promo brings the price down to $69.99. For a total investment of $115.48, I now have great 2D/3D Cad software package!