what is grandfather sim?

[Krissi Soulstar]

I see it listed alot.

[Alwin Alcott]

https://community.secondlife.com/t5/forums/searchpage/tab/message?filter=location&location=qanda-board%3Asla_land&q=grandfather

[Amethyst Jetaime]

It used to mean a sim that was owned before the price of the tier went to $295US a month.  Their tier remained at $195 a month.  LL recently allowed sim owners who pay the higher rate to buy down their tier to the grandfathered rate by paying a one time fee of $600.00.  There is also a higher transfer to new owner fee.  See the link Alwin gave for more details if you are interested.