I posted once about it a while ago, but there in no official policy. right now what we do is archive the data after 4 months. archiving basically strips out all info except what is needed for the stats and keeps the database lean. I removed the "all-time" column after reading this thread to avoid further issues. It's kind of unimportant for judging a buyer and I think it is nicer on the eyes/mind to have 3 instead of 4 data points to look at anyway.