I'm thinking that 'Washburn' is an Oscar Schmidt by Washburn.

The only Washburn Mando I know of that comes with a pickup is the M3SWE, an F Style (florentine) body, solid woods, that lists for over a Grand. It has an active (under saddle) p/u w/ preamp on the top side of the body.

On the other hand, the Oscar Schmidt OM10E is a laminated wood A-Style ('teardrop') body with a passive p/u, vol/tone controls on the face. It lists for around $300 and can usually be had new for half that or a bit more.

That's the more likely one for $85. It's more than decent as a starter mando. I had one, and felt I got the hang of the little beast good enough to upgrade to a Washburn M6SW (solid woods F-Style, non-elelctric).

If it's the M3Sw, then steal it fast for $85.

In a nutshell, you just won't get loud, 'ringing' mando tone from a lam wood model like you will from a solid carved maple b/s, solid spruce top model, but that matters little if its juiced.