Paid 1100 for my 86 a few years ago. It was my first bike, worked out fine. I'm 6'2-6'3 - It's not as big as some bikes but I don't think I look ridiculous on it.
Check the charging with a multi-meter. You want to see north of 14v DC @ 5000RPM directly on the battery.
For that year and mileage, you should be fine as long as she's in running condition. The tires may be at the point you want to change them, just due to the age.
1986 Kawasaki Vulcan 750
NGK Iridium Plugs #7803/DPR7EIX-9
Duralast Gold ETX15 AGM Battery
Coastered & Shaved
Metzeler ME880 [110/90-19, 170/80-15]
Balance Dampers Replaced
Rebuilt Forks w/ Progressive Springs
VN750.com Grill Cover
Emgo 23-92411 Handlebars
MOSFET FH012AA R/R
1990 Kawasaki Vulcan 750
1998 Honda VFR800 FI
2014 Honda VFR800F
1989 Pontiac Firebird Formula 350