Get her a used Empire Axe, or an 07 Ego for $300.
I also have two NXT shockers I'd sell for $200 each, with the eigenbolt out now its a great option and theyre PSP ready. Buying used will get you much further in the realm of high end markers than buying new. The mini and g4 are low end, beginner markers and the quality shows. For $200 - $350 you have a slew of options on the used market