Ron,
In my for sale thread i have some that i opened from damaged baggies, these were opened not long ago, by myself and a postie lol (long story).
Since then they have been sealed in zip locks, they even smell new.
I have emperors,prune faces, c3po,r2d2,chewie,leia endor, most old palitoy stock.
Just remember that most baggies are actually pretty scarce when compared to carded.
Even the common figures are harder to find bagged than carded, so opening a good one imo is the same as opening a good condition moc.
Obviously its up to you at the end of the day, its just a sore point with me as a baggie collector lol.
Also remember that the bag does not give that much protection (not as much as a bubble), so a lot of bagged figures actually have paint damage.
I have a luke bespin blonde hair (pretty htf/expensive) that is in pretty bad condition, he has a chip out of his head, paint wear, but the seal is 100% legit.
I know if i wanted a loose 'mint' set i'd go for cut cards over baggies anyday.
Del (who loves his baggies :mrgreen: )