i found this Marshall Bass 7400 at Music Go Round for $600, is it a good deal? should i jump on it? i played out of it for a little bit and it sounded great, but i didnt really have time to check it out that well. it was in great working cond., looked great, so is this a good deal or not? there was one on eBay, the item number is 1428552012 , it has specs and a pic there so you can check it out if ya want. what do you think?