Re: Marshall JCM900 SL-X 50W 5881's , 1993...
I had an SL-X for years as my main amp. Like the previous poster's said, it's not very versatile. But it does give you that one great sound. But just one. The best use of an SL-X was Weezer's song "Buddy Holly." It's a great amp if you like mids with your mids, along with a side order of mids. I will admit that mind had the old Ruby tubes EL-34 so that will make a bit of a difference from your 5881's, but I will admit that it's built like a tank. $600 is an exact fair price. Not a dollar too much, but not a dollar too little either. As far as a trade, well that is up to you. Like a lot of guys on here will tell you, only you can tell you what good tone sounds like. I sold mine because my Genz Benz El Diablo was so versatile I could get the SL-X's tone from it, along with 100 different sounds, versus the SL-X only giving me one good sound. I'd say give it a try, and remember the speaker cabinets do make a difference. I used and still use a Marshall 1960 w/ the 75 watt Celestions. Good luck in whatever you decide to do.