I need help quick guys/gals. In a couple of hours Im going to a shop that has a Walkabout for 699 thats been traded in. They are going to give me 250 for my Ampeg B2r. What should i look for when insepecting this amp besides the usual dents/scratches. Of course im bringing my bass to try it out. They have some Aguilar Gs112s there... Thanks for the help.