Well said Matt.
Some of these ebay sellers are as thick as pigsh&t, they charge triple actual amount for postage, they don't put card in the mailers, they can't grade the records properly and they can't communicate. I sell a lot of records on ebay and they get mailed out the same day or the following day as the customer pays, same as on my mailing list. Last week I was late with one record, and that was actually because we thought Grace was very ill and I didn't have time to tell the buyer I couldn't get to the post office - but he understood. Only takes a second to write a message.
p.s. will you come with me next time I need to threaten someone