Welcome to the forum, Ita.
Many folks are finding that it's tough to sell such items nowdays (not alway true, though), since lightweight/portable electronic keyboards/pianos are readily available ; also costs for moving, tuning & repairs can be prohibitive for the buyers.
You may be able to get an idea of prices in your reigon, by going to Craigslist.org & checking that resource.
Could you please post the serial number of your piano (can do a bit of research with this).