hi, some guy I know is selling a trace elliot "ah300smx" head and large 4 speaker cabinet ( 1048(h?),i think?) all for 750 euros (about 500 pounds, or 750 US dollars)but he brought it 2nd hand from his bass teacher! do you think i should buy it or not? please help me cause i dont know what to do and ive got a gig in 3 weeks! thank you very much, tim walker.