As much as I'd like to add another ACI owner to the community, I would really reccomend that your friend take that $50 and rent a marker at the local field. That way he can get a feel for the game and see if he would actually like it enough to own a marker and play again.
Besides the first $50 is better spent on a mask, ever rented a mask? They smell like barf lol
As for interpreting your horoscope, hmm maybe you will find that the ACI is the marker for you?
Anyways, as welts sais "What gun is it exactly?"
ACI has produced:
1. F4 Illustrator - A great marker, rugged and dependable.
2. Griffin - Less than desirable
3. Maverick/Tracer Pumps - No one plays pumps really
4. Sinister - A spyder clone and not bad
5. The newer markers - which dont look half bad but probably not what the one guy is offering used.
They all have different attributes that may or may not make them a good marker for your friend. Best to find out before anything else.