introduced with that setup (DT ratchet shifters) in '84, and offered again in '85
- modest place in the Fuji line, SunTour ARX (under $200 new) - the 2-pc seatpost/clamp gives it away
Should be a great-riding and reliable bike - not particularly light, though certainly not heavy
Your bike has upgraded rims (note the original rims were for Schraeder valves) - yours look like Mavic (are they tubies?) - might check the hubs, as well.
http://www.classicfuji.com/Espree_Model_Years_Thumbs.htm
Rather than collectible, this would make a great rider project for somebody (clean and grease bearings, new cables, tires, brake pads, bar wrap, saddle? - I'd change the seatpost to basic Kalloy).
It's a better bike, more desirable, and in much better condition than the '85 Shogun my buddy's daughter bought at Frankenbike for $100 and built into her college commuter.
Her efforts came out really great, and I need to get a photo...
Though both bikes started about the same price range, the SunTour ARX is better than the Shimano 300 Exage that was on her bike - in fact, the Shimano RD on her bike was cracked right where Shimano RDs crack (replaced with a new Deore RD). Even with downgraded metallurgy, the SunTour ARX isn't going to crack.
Her same age Shogun Selectric was the introduction of Shimano indexing (SIS), which SunTour did not then offer, and eventually completely lost out to Shimano because they never caught up in indexing.
6-speed rear doesn't need indexing (even new $2000 Rivendells today are friction shifting 9 sp rear using a derivative of your same SunTour shifters, which copied Simplex).
Though low-grade Shimano RDs do tend to crack (all at the exact same stress riser), the consistency in their indexing shows, in that, their very first 1985 indexing shifter works perfectly with a 2015 RD.