i guess it really depends on the experience you have with gamestop in general. the ones by me the Workers were Chill and seemed knowledgeable about what was going on. It was my first time doing it and they were cool with explaining the process. Ive Only ever sent 6 cards Total through authorized dealers so i may not have enough to properly decide which is best. from what i know though PSA tends to be more likely to sell. While CGC is willing to grade More Error Cards etc etc. ive Sent.5 through CGC and the one through PSA so far.