May you have peace!
Your questions "If Jesus has paid the price, if what Adam lost has been restored, if we have truly been redeemed and the ransom price paid (and presented to Jehovah according to the Bible...) then why do we still die? Why are we still living in 'sin' 2,000 years later?" are a little inaccurate with regard to what the ransom "covered"... and when. Please permit me to explain, just as my Lord has granted me to. Thank you.
What -
The "price" that Christ "paid" was for the right... to "everlasting life," which Adam "lost": first, he "sold" his progeny into slavery to sin and death (that was the "exchange") and because HE was "cut off" from the Garden of Eden so that HE could not reenter and eat from the Tree of Life, so his progeny were cut off, too.
Christ did not, however, redeem us from death of the flesh NOW... but to everlasting life LATER. What Christ "repurchased"... was (1) a RELEASE from the HOLD that death has on us... ("I have the keys to death and Hades")... so that even if we DO die (in the flesh), by means of HIM we can LIVE... in the SPIRIT - Death... cannot HOLD... the SPIRIT; and (2) a RIGHT to reenter and EAT... from the Tree of Life... which Tree IS the Christ ("I am the True Vine", "You are branches in ME," "the ROOT of Jesse," "SPROUT!"). If we eat from HIM... from the 'leaves' of HIS 'tree'... his flesh... then although we might die in the flesh... we can be resurrected to life... in the SPIRIT.
When -
NOT now, but:
1. For those "who belong to the Christ" - when he returns to "gather" them "from the four extremities of the heavens." These are either (1) resurrected as spirits to spirit bodies - WHITE "robes" - immediately upon my Lord's return ("he that has died will be brought back to life")... OR (2) instantly changed to spirits in spirit bodies at that time ("he that has NOT died, will never die"). So that TOGETHER... they meet the Lord in the air... and, as his "bride"... are taken to his Father's house to be "married" to him ("If I go my way to prepare a place for you, I am coming AGAIN... and will receive you HOME to myself, that were I am you ALSO may be.")
1 Thessalonians 4:15-17
2. For those who do NOT belong to Christ, but receive a blessing... for "doing good" to Christ's brothers... in the manner of Rahab... who was NOT an Israelite, nor under the Law Covenant when she made a deal for the salvation of her entire household... "in the 're-creation'", when Christ and his "bride," the 144,000 AND "great crowd", who TOGETHER make up ONE flock... sit down on thrones... and separate the "sheep" (who are sheep by means of the "good" they did TO Christ's brothers)... and the "goats"... (who are goats by means of they good they did NOT do to Christ's brothers).
The sheep "inherit" the kingdom: they are allowed to enter the kingdom and become subjects of Christ and his brother co-rulers. At that time, THEY receive "everlasting life" because once they enter the "City"... that have access to and can eat FROM... the Tree of Life, which eating sustains them.
The goats, however, are "cut OFF" from entry, thus, they can NOT eat from that Tree... and are basically "dead"... because they do not have "life within themselves." Please note that the goats are NOT destroyed... at that time... as the Society falsely teaches. Their destruction occurs when they... Gog... and the "angels that sinned"... Magog... are "misled" by Satan (upon his release from the abyss) to "encircle the camp and go AGAINST the Holy City"... in an effort to gain entry. Why? To eat... from the Tree of Life... and live forever.
Satan, thus, gathers them... to the place that is called Harmaggedon... the "field" right outside the Holy City. It is THERE that fire comes down out of heaven and destroys BOTH Gog... the goats that were cut off... and Magog... the angels that were cut off... everlastingly. Thus, "the heavens and earth (spirit and flesh) that are NOW... are stored UP... for fire."
All of these in Item 2, however, are living at the time of the return of Christ. Those who did not belong to Christ... but are DEAD... do not come to life until the thousand years have ended. For once that 1,000 years have ended, and Satan does his misleading attempt, and Gog and Magog... and Satan... are destroyed... THEN is the "resurrection of the dead"... THEN is when "the sea gives up those in it, and death and Hades give up those in THEM." The first resurrection is the resurrection... of the LIVING, "for God is a God "of the LIVING".
For those who are resurrection at THAT time... it is either to life... by means of having their sins... as read from scrolls in which are their deeds... good AND bad... "covered"... by the blood of the Lamb. These include "the spirits of those who sinned" during Noah's day. Those who are resurrected to JUDGMENT... are destroyed. This is because their sins... have no "covering"... and the "wage" or PRICE of sin... is death. This... is the "second death"... destruction in the lake of fire... from which there is NO resurrection.
I, SJ, have told it to you just as I received it from my Lord and Master, JAHESHUA MISCHAJAH, the Son and Christ of the Most Holy One of Israel, the God of Abraham, Isaac and Jacob, whose name is JAH... of Armies.
Again, I bid you peace.