While in Sam Ash today, I stumbled onto an Acoustic halfstack. The head was solid state "Model 450" and the cab was a "402" I believe (it was a 4 x 12). The salesman told me that the head was voiced for guitar or bass, but didn't really know anything else about it. He said he thought the guy who traded it in said it was from the early 80's or late 70's. I realize I should have made note of the serial numbers, but it's too late for that now. I played around on it for about an hour and it was LOUD (I've been going to rock/punk shows for years and have heard loud). Long story short, I liked the way it sounded and the guy said he could give me the rig for $550 with a one year maintenence plan. The amp/cab was in great shape, but I had never heard of this stuff so I wanted to see if anyone on here had any experience with this stuff. I am trying to assemble a gig worthy rig on a budget and the "new "setup I cold get would be an Ashdown Mag300 and either the matched cab or an avatar. There are no stores around me that carry a lot of used gear, so my options are limited. I worry that an amp this old will only cause problems so I would like some insight. Thanks for any advice you could offer.