Hard to guess. It may be a stripper version with vinyl seats and a plastic floor. Some fleet vehicles got the extended idle switches. I'd also check the axles and gearing. Some fleet vehicles came with a stronger axles (D44) and/or deeper gearing. Possibly has a fuel tank skid plate - but being a 2wd that could be a long shot.
Depending what they used it for, check also for holes they may have drilled in the body/floor for lights, antennas, communications, etc.
Kelly Blue Book shows a private party sale in good condition for a base model 2wd to be closer to $2000. For reference, I got an '01 60th Anniversary model 4x4 with 125000 for $4500. $3500 seems really steep to me for that - assuming stripper model.