As Rod said, 130pt (pulls eBay sold listings) or direct eBay sold listings are the best options for getting an accurate value.
The 2 main grading companies are BGS and PSA, prices just went up significantly to grade and the wait time is huge. I have cards submitted via BGS since May 2020 and PSA August 2020 and still no word as to when I'll be getting them back.
There are a couple of aussie facilitators who submit to BGS and PSA, they have facebook pages so a search will probably find them.
You need to also take into account the condition in the first place, if they have been penny sleaved and kept in pack fresh condition then it may be worth grading the higher end cards.
If you list the ones you think are higher end, I can let you know here if they are in fact worth that much, but the big ticket cards are MJ Fleer RC, Scoring Kings, Power in the Key, Finest Refractors, PGM's, and other particular harder to find insert cards.