There are a few used ones for sale,and yes there are some out there that have problems.Since we repair blocks we see many blocks of all manufacture that have serious problems.Most all the issues were not related to the manufacturing of the block,most were due to incorrect machine work, incorrect assembly,incorrect or wrong application,and abuse.Usually when some one screws up they look to place fault elseware. We have never had to return a single Indy Max block for warrenty or repair.