i've sold quite a few beats before and this is what i did:
Took the pattern of each instrument, so lets say the sample i used, i exported the sample, then the drums, the bassline. the sfx, etc. zipped them all up. But i export each pattern in .wav format and then i create the full intstrumetnal and zip that up too just in case they don't want to change anything at all and dont want to sequence it all out again.
I then put a small business card in the insert of the cover with my website addy, phone number,etc. so that they can pass it onto potential buyers. It's a good thing to do because i got another beat customer via that way.
Streetwize