If my understanding is correct about the Masoretic text, its origins are around the 8th century. Though this is from memory and my memory has failed me before.
There are some that question whether or not it was a legitimate source to translate from. They prefer the Septuagint, which is much older and according to them is a much more accurate rendition of the Scriptures. However, one source that believed this also said that Jesus himself quoted from the Septuagint. I find this quite laughable since the Septuagint’s origins are between the 1st and 3rd century.

I only mention these things, because I thought they were interesting, but quite frankly beyond my ability to know if they are true.
I do however have my doubts, because there are many Bible's such as the KJV and the ESV that use the Masoretic text.

If I don't have my facts straight, by all mean correct me.

Tom