Three real cards, pulled today from eBay listings: raw, PSA 9 and PSA 10 prices, grading cost and what you are left with in each case.
Kardz queries eBay when you search, keeps the listings that truly match the card (same number, same version, accessories excluded), separates raw from graded, then works out the cost of grading (card + fees + shipping) and what each scenario returns after selling fees. These are asking prices, not completed sales.