You should do OK selling it,,depending on what people are looking for !! Its usually just a matter of personal taste as to who wants what !!

Dead Uncle’estate.

That weight is hard to imagine sitting on someones furniture !! And that weight is for a solid block !! But maybe it does !! Most of these that are unsigned are Italian imports and a few are signed !! Mexico also does a lot of alabaster carving !! No way to even guess who made it without a signature !! Most all of the selling sites have alabaster figurines of all types !! The classical/historic and religious figurines seem to do best price wise !!
Where did you get this one ??

Alabaster weighs 140 to 170 lbs. per cubic foot. I think it fair to think the statue is at least 1/6 of a cu. ft. or somewhere around 20 lbs.

You are right. The actual weight is 19.8 lbs. and my scale is correct. It is a stone material and I can think of several stone materials that weigh that much.