Actually, the word used does not mean finished, it means consummated.
Although there is room for conjecture and disagreement, it occurred to me during a Seder that since it followed Jesus receiving the sour wine on the Hysop reed in was in fulfillment of Mark 14:25. It was the announcement of the "Nirtzah", the Fourth Cup of the Seder, the Cup of Acceptance and the conclusion of the Seder.
Peace be with you
Actually, no, it doesn't mean "consummated", except, ironically, in the Douay-Rheims version of the Bible. The Greek word is teleÅ, and it means:
1) to bring to a close, to finish, to end
2) to perform, execute, complete, fulfil, (so that the thing done corresponds to what has been said, the order, command etc.)
b) with reference also to the form, to do just as commanded, and generally involving the notion of time, to perform the last act which completes a process, to accomplish, fulfil
3) to pay
In John 19:30 the word means, "It is finished." Christ satisfied God's justice by dying for all to pay for the sins of the elect. These sins can never be punished again since that would violate God's justice. Sins can only be punished once, either by a substitute or by yourself.
That is why we CAN know that the ONLY place of purgation is the cross of Christ, He alone is who cleanses us, His blood is the propitiation for ALL our sins and once we die, if we have received Christ's gift of eternal life, we will be with Him in heaven - no need for a stop or stay at a cleaning station.
For by a single offering he has perfected for all time those who are being sanctified. (Hebrews 10:14)
And by that will, we have been made holy through the sacrifice of the body of Jesus Christ once for all. (Hebrews 10:10)
There's a couple hundred of bible committees over the years who seem to disagree with you...