[frankbmd]

Does not mean which individual slab sells for more money is not ROI.

Your cost is just as important in determining ROI.

Three identical cards are graded identically by TPG A, TPG B AND TPG C.

if you paid $100 for the TPG A, and sold it for $200, your ROI IS 100%.

If you paid $500 for the TPG B, and sold it for $625, your ROI IS 25%.

If you paid $900 for the TPG C, and sold it for $990. Your ROI IS 10%.

Your net gain for A is $100, net gain for B is $125 and your net gain for C is $90.

Pretty simple math, but if A is CGC, B is SGC and C is PSA.

However I would maintain A with highest ROI is the card I would buy.

If I needed more cash in hand, I would sell the B card.

If I bought the C card because I was convinced PSA was the best like many sheeple, I would regret the purchase.

Personally I would buy As all day long.

Cost must not be excluded from the equation if you want to boast about your ROI.