Does anyone know why on some of my used vinyl purchases the album is outside of the sleeve when shipped? Is there a reason for doing that?

Thanks, Yogiboy
It keeps the album from shifting inside the jacket during shipping and cutting the jacket (seam splits).
So the jacket is not split in transit by having the record slosh around inside it. It's the right way to ship used vinyl providing the shipper also uses adequate protection on the outside of the record.
It's so that if the package gets bumped around during shipping, the record doesn't tear through the outer sleeve and rip the spine. It's a sign of a good and diligent trader.
Whow i didnt know that how cool.
If you buy new vinyl online you should ask the seller to do the same.