I don't know about a used version, but I had EQ5 and really liked it, so much so that I upgraded to EQ6 as soon as it came out. There are several here on the board who have EQ, and who might be able to help with any queries you have, also there is a forum for EQers on their website, plus there are a range of books printed to help you or encourage you in different directions - you could ask for one or two of them for Christmas presents.