I was thinking somewhere between the 3 to 5 thousand range...
One can buy a brand new or slightly used upright for that, complete with warranty and one free tuning from a dealer, and sometimes free delivery. Yours could be worth anything from $0 to maybe $1300 on a really, really good day.... Like, a rainbows and sunshine kind of good day, complete with unicorns (Sorry, just trying to drive home the point). A more realistic expectation would be a few hundred dollars.
hmmm so is there a ballpark range for me to sell it in? Does a 35 year old piano lose a ton of value?
Yes. Uprights this old retain 20% of their value at best
. Currently, they sell for $6000 give or take a few Benjamins, so 20% of that is the best
you can reasonably expect to get.