does messiah 2 have problems with some games?

[yoink]

took the ps2 back today, the guy assures me that I do have a messiah 2 and that the problem I'm having is caused by a dodgy laser. He took it apart and cleaned it for me, but all of those games still don't work. The laser could be on its way out I guess, a few weeks ago with the old modchip I had a few completely different games that weren't too happy about booting.

I paid $US85 for the chip yesterday - does that sound like a reasonable price for a messiah 2?