Is this barrels safe for ato and mixing salt water?

[Coleus]

Saw this ads, was wondering if it is safe to use in saltwater

http://alberta.kijiji.ca/c-buy-and-sell-other-PLASTIC-BARRELS-W0QQAdIdZ172169304

[Binare]

Depends what its been used for throughout its life. How much is a new one? Is the cost savings worth the risk? Thats how I see it ;-)

[Aquattro]

There are two other threads going on right now for these types of barrels, apparently used for cauliflower?