Is this pair of OMS steel 85's a deal worth jumping on?

[bamafan]

The guy at the testing place was a bit of a pessimist I think because he said "everybody" overfills the steel tanks to 3000 PSI and then "most steel tanks" fail when brought in and he wanted to warn me ahead of time that might be the case. 

That is a bs statement. If this was the case then every steel tank in cave country would fail hydro. I personally have some LP tanks from the 80's and they have been filled to 3600 - 3800 psi their whole life.

 

[claymore]

Tank pressure ratings are at room temperature. The design of the tank takes into account the pressure increases that occur when when the tank is exposed to higher temperatures, that can normally be expected in normal use.
A tank filled at room temperature to it's rated pressure can be several hundred psi higher if left in a car that is in the hot sun or several hundred psi lower than the rated psi if it is used in the winter or in cold water.

Within reason pressurizing a tank beyond its rating is probably less of a worry than getting moisture in the tank and causing rust.