Welcome Travis!
1977 was the last year of the channel frames I think... Or something about the '78 and later CJ's being more desireable than the earlier ones. (This is per comments in the Jeep Owners' Bible by Moses Ludel.) That said, the later '77's may have the desireable 'improvements' sought. (It could also be front disc brakes too... not sure when CJ's went from 4 wheel drum to front discs.)
Anyhow, per Mr. Ludel, the '78 & '79 model CJ's are
his picks for the best model years of the CJ's.
Levi Edition CJ's are pretty sought after I think, but I have no idea what condition the one you are considering is in. Nor what you are intending to do with it... restore, daily drive(r); minimal/mid/extreme build-up for off-roading, etc. If latter, the rarity of the Levi Ed. is lost on your ultimate goal.
Finally, unless in REAL GOOD condition, $3200 sounds like a whole LOTTA money to me for a '77 -5.
Tell us some more about the condition: body (in & out), motor, tranny, axles, etc... and maybe we can help you out a little more.
Again, welcome!