Recently have sent some cards to PSA and have finally had them returned - happy with some grades but I thought some cards were graded a bit rougher than others.

Is the best way to price these just through eBay listings? I have done some research and about to send another lot off to grading - but should I send it through Beckett or PSA ?

Would happily take advice and discuss the cards further as only recently inherited a Grand collection of 100,00+ cards, mainly Royals, Diamondbacks and complete topps/upperdeck sets - Thankyou !!