Certified Blue Topaz gemstone

I have up for sale a few gorgeous gemstones that my (now deceased) grandpop gifted me. My car just died, and I need to find a new one before my job starts back up from vacation break, so it's a hard thing to part with. This is 24.35ct Blue Topaz. check pics for the information on it. I am not a professional gemologist, so I cannot give any more info than what I'm currently aware of. I will list it at an appropriate value and review all reasonable offers. No low-balling tolerated; these are real gems, and sentimental pieces, not plastic paperweights.