If feedback was left unintentionally or prematurely and the items are not received then I would say no the deal is obviously not done. You should be able to track the package and determine what's going on. If you are unable to do so and the package isn't received in 10 days i would offer a refund or substitution if it can be agreed upon with the buyer/trader.
Hopefully it gets to the destination and all stays positive.
GL with unique situation.
Buying Tyrell Williams Contenders Autos
Join My $50 Fantasy Football League with bounty on my head!