You can price several ways:
1) Look at a comparable graded, Subtract grading fees then 10-20% OR
2) Look at what the lower end of eBay sales (incl shipping) for comparable condition and adjust as you see fit OR
3) Reference GM sales and multiply by .7
All 3 methods should get you in a ballpark range for raw.
I really don't GAFF about graded cards, but the one thing is that they are far easier to price. If you are targeting buyers who are looking to grade, you'll probably have to come down even more for them.
I recently had this convo:
Buyer: (offers 1/2 asking on a NMMT card)
Me: Sorry, but it's very fairly priced.
Buyer: Well after PSA fees, it would have to grade a 9 for it to be worth it.
Me:
Buyer: I really like the card
I sold it later that night to someone else.