There are free downloadable CAD programs, free object files and free 3-D prep programs. I have high hopes that some day I will get my $279 printer working some day.
Try eBay and the Internet. I bought a CTC a couple months ago. Prices are all over a range from $600 - $2000, for essentially the same printer. I bought my black CTC for $660. The plain plywood tan color are generally $60 - $100 cheaper, although functionally identical. This is a clone of the Makerbot Replicator 1, at a huge savings. Dual extruders, heated build table, can print with different type filaments including ABS, PLA and Nylon. One shortcoming is a small build area of 6 inch by 6 inch by 9 inch, same as the more expensive machines. I get around this by assembling pieces to fit together, either with solvent or with aluminum rivet nuts and machine screws. So far, only about 10 percent of what I've made have been toys for my grandchildren. All the software I use is downloadable and free - Autodesk 123D and ReplicatorG being a couple examples.
I'm going to try to make some of these grown-up items with nylon, it being a very tough material.