I had an MB4 from new in the sparkle black finish, bought it in '93 IIRC, the first new bass I'd ever bought. Good to look at, good to play, shame it only sounded OK. It was significantly lighter than the Westone Thunder 1A I had, so it became the main bass. The guitarist in the band I was in at the time also had a Washburn Mercury guitar (bought from the same shop).
Haven't seen any of the 90's Washburns in a long time.
Must admit, I much preferred their 80's basses.