[53toppscollector]

Here is the very short summary:

PSA = cards generally carry the highest resale value. Slab looks okay, wait times are horrendous and the cost is extremely prohibitive. They've been caught up in the trimming debacle in the last few years

SGC = some people love the slab, others hate it. For cards with a white border it looks great. The flip is meh. They currently have by far the best turnaround times and cost and are well respected for vintage, especially pre-war

BGS = massive delays, and their grading for vintage stuff is poor, IMO. They are still the gold standard for autos and RPAs, if you are into that kind of stuff

CSG = new to sports card grading, but a good rep for grading other collectibles. I personally hate the way their slabs look, and their resale value lags well behind PSA

HGA = their flips are all over the map, and there have been major questions raised about their QC processes and grading overall. I'd steer clear.