the fact it is a 5spd manual is what is hindering sale here... seems no one but us "old timers" know how to drive them.
KBB ranks this car in the $1700-3250 range for price in "very good" condition for "private party" sale in PA (picking a random PA zipcode and using basic options)
my 2004 Forester was for sale for a while @ $2200 - had many lookers until they realized it was a manual, not an automatic.. and I picked it up for $2000 in cash (in north-central WI) due to it being due for a timing job, and some other minor issues.
Most used car buyers are not interested in how special or rare a car may be.. that is a very small group of buyers, and they are few and far between.
If you really are set on selling it as something to be coveted for what it is, raise the price to $6500 and advertise it as "rare".. see what happens.