First-off: I am not trying to sell anything here on PE.

I have a small (<250) collection of mostly Bronze and a few Silver age books that have been decently preserved, and am looking to liquidate. I know I could just put them up individually on eBay, but I'm wondering if anyone here who has tested these waters has any do/do not do advice in this area, including grading the books or having them graded?

Thanks in advance for any input!