"Love the Christian Thinktank, just a quick question about the Transfiguration,
if Jesus is the "first fruit" how could Moses and Elijah appear from their graves?

Actually, they were not resurrected in the same sense that Jesus was.
 
Elijah actually didn't die in the way we do, remember--he was carried up into heaven.
 
And Moses could appear without being raised from the grave, like Samuel could appear to Saul--without being raised from the dead.
 
The firstfruits image/theme is of the BIG and TOTAL and FINAL resurrection in glorified bodies. Not mere resuscitation, but as the 'mortal putting on immortality'--a complete new level of existence. Jesus was the first fruits of THAT, clearly.

Also remember that we had resurrections --without glorified bodies--prior to the resurrection of Jesus. We had those in the times of Elijah and his successor, several during the ministry of Jesus, and the temporary resurrections described by Matthew at the time of the Crucifixion.

All of these people would have died again--not having received an incorruptible body--so Jesus was the true first-fruits of His Cross-based victory over sin-and-death.
 
make sense?

(sorry so brief--writing from a hotel on a business trip)...