Are there any (semi) intact Christian bibles/scriptures from before Constantine?

Question

Mostly just curiosity in how the text has changed over time.

Answer 1

Actually the text has not changed over time. Whole codecies, fragments, and extant books and letters of the Scriptures date back to as early as AD 37. There are over 5,000 of them which is a much more overwhelming number than any other piece of ancient literature. Plato's Republic has 8 copies found hundreds of years after he wrote the book. You won't find more documentary evidence of any ancient book that surpasses that of the Bible.

If you're speaking of the Old Testament, the Septuagint, the Syriac translation, the Leningrad Codex and the Dead Sea Scrolls are all in agreement. With the exception of the Leningrad Codex, these predate Jesus' life by hundreds of years with no differences that are scientifically significant between them.