Is anyone here a seasoned ebay vendor? Just after some advice...

I have a stack of old shit to sell (principally boxes and boxes of old CDs, some of which rare / good albums), but am wary that I won't initially have any feedback so this might put people off buying, or mean I have to sell stuff cheaper than I may otherwise have been able to.

So my questions I guess are :

1) Do the majority of people actually care about whether a seller has feedback or not if they sound trustworthy from the product description?

2) If so, are there any hints as to how I'd go about getting positive feedback quickly?

3) How many sales does it take to get a useful feedback rating?

...errrm and any other advice?

Cheers!