Hello looking at this corvette around me curious what everyone think its worth, has been sitting a few years has 89k miles on it.

84 is the only c4 year for the cross fire injection. Honestly I would not pay more than $5-700 for it. You have alot or maint. and small repairs to do and if your not mechanically inclined, you have to find someone to work on the crossfire system. 
for ref.  I paid 1000 for my 87 convertible with 60 k on it. To date ALL IN right down to the tow to my house, I’m at about $9000 including maint for the past 10 years, ALL work performed by me including the valve seals ( it’s a Chevy, you will need to do it).  Can I sell for that possibly? Is it fun? Hell yeah! So it’s worth the 9 k to me. 
good luck

Does it run? Can you get under the hood and inside to see what kind of shape everything is in? What are they asking for it?

Also, what's with the C1 in the background?!