Dear Samantha,
There is a group of folks that have gotten a thread together for folks in your situation. They either didn't want to buy a high dollar press, or couldn't buy one in the size they wanted due to $$.
Here is the thread, it will help you, trust me. You will find the recommended model of press in there that folks generally had/have good luck with. Sunie is the name that comes to mind. They talk about where to save money buying this press.
New "Cheap" Heat Press Arriving Today
Some names of folks that I know that have bought off brand presses and were happy are Billm75 and Mrdavid. They are in this thread. Once you look the thread over, ask the folks what you need to know.
Another alternative is to check the classifieds section of this forum. Folks will list their presses that they upgrade from, or presses that they no longer find they use, and there are some Great Deals in there.
As well, I know at least two folks have posted that they bought good presses at garage sales for $20!! That's right, and one of them was a 16x20.
There are ways, and alternatives, to buying equipment without dropping the big nickels for the brand name presses retail.